{"id":12858,"date":"2023-08-01T02:22:43","date_gmt":"2023-08-01T02:22:43","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=12858"},"modified":"2023-12-26T08:35:57","modified_gmt":"2023-12-26T08:35:57","slug":"what-is-cosine-law","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/de\/glossary\/what-is-cosine-law\/","title":{"rendered":"What is Cosine Law"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-cosine-law\">What is Cosine Law<\/h2>\n\n\n<p class=\"wp-block-paragraph\">The cosine law, also known as Lambert&#8217;s cosine law or the cosine emission law, is a fundamental principle in the lighting industry. It states that the radiant intensity from an ideal diffusely reflecting surface is directly proportional to the cosine of the angle between the direction of incident light and the surface normal. This law, named after Johann Heinrich Lambert, is studied in optics and plays a crucial role in understanding how light is distributed and how it affects the illumination of a surface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The cosine law of illumination is used to calculate the illuminance (or irradiance) on a surface based on the angle of incidence. It provides a mathematical relationship that determines the amount of light falling on a surface by considering the angle at which the light hits the surface. 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Deckenmontage<\/li><li>12 VDC \/ 24 VDC Eingang mit 10\u201330 VDC Bereich<\/li><li>10A max. Arbeitsstrom mit einstellbarer Zeitverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz047-12v-24v\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz047-10a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ047 deckenmontierter Mikrowellen-Bewegungsmelderschalter\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200.jpg 1200w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-100x100.jpg 100w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz047-10a\/\">RZ047-10A 360-Grad-Decken-Mikrowellen-Bewegungssensorschalter<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Decken-Mikrowellen-Bewegungssensorschalter f\u00fcr h\u00f6here Lasten<\/li><li>100\u2013265 VAC Netzspannungseingang, 10A-Modell<\/li><li>5,8-GHz-Mikrowellenerfassung mit einstellbarer Zeitverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz047-10a\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz047-5a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ047 deckenmontierter Mikrowellen-Bewegungsmelderschalter\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200.jpg 1200w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz047-main-product-square-1200-100x100.jpg 100w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz047-5a\/\">RZ047-5A 360-Grad-Decken-Mikrowellen-Bewegungssensorschalter<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Mikrowellen-Bewegungssensorschalter f\u00fcr die Deckenmontage<\/li><li>100\u2013265 VAC Netzspannungseingang, 5A-Modell<\/li><li>5,8-GHz-Mikrowellenerfassung mit einstellbarer Zeitverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz047-5a\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz038-12v-24v\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1600\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ038 Einbau-PIR-Bewegungsmelder f\u00fcr die Decke, Draufsicht und Seitenansicht\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side.png 1600w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-1536x1536.png 1536w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-1024x1024.png 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-300x300.png 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-768x768.png 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-150x150.png 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-12x12.png 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-100x100.png 100w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-top-side-1200x1200.png 1200w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-12v-24v\/\">RZ038 12V\/24V 360-Grad-Unterputz-PIR-Bewegungssensorschalter f\u00fcr die Decke<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Niederspannungs-DC-Unterputz-PIR-Bewegungssensorschalter f\u00fcr die Deckenmontage<\/li><li>12 VDC \/ 24 VDC Eingang mit 10\u201330 VDC Bereich<\/li><li>Maximaler Betriebsstrom 10A mit einstellbarer Zeitverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-12v-24v\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz038-10a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1600\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ038 Einbau-PIR-Bewegungsmelder f\u00fcr die Decke, Vorderansicht\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front.png 1600w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1536x1536.png 1536w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1024x1024.png 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-300x300.png 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-768x768.png 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-150x150.png 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-12x12.png 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-100x100.png 100w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1200x1200.png 1200w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-10a\/\">RZ038-10A 360-Grad PIR-Bewegungssensorschalter f\u00fcr Deckeneinbau<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>PIR-Bewegungssensorschalter f\u00fcr Deckeneinbau f\u00fcr h\u00f6here Lasten<\/li><li>100\u2013265 VAC Netzspannungseingang, 10A-Modell<\/li><li>360-Grad-Erfassung mit einstellbarer Ausschaltverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-10a\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz038-5a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1600\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ038 Einbau-PIR-Bewegungsmelder f\u00fcr die Decke, Vorderansicht\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front.png 1600w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1536x1536.png 1536w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1024x1024.png 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-300x300.png 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-768x768.png 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-150x150.png 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-12x12.png 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-100x100.png 100w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz038-main-front-1200x1200.png 1200w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-5a\/\">RZ038-5A 360-Grad PIR-Bewegungssensorschalter f\u00fcr Deckeneinbau<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>PIR-Bewegungssensorschalter f\u00fcr Deckeneinbau<\/li><li>100\u2013265 VAC Netzspannungseingang, 5A-Modell<\/li><li>360-Grad-Erfassung mit einstellbarer Ausschaltverz\u00f6gerung, Lux-Schwelle und Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz038-5a\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz040\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"RZ040 Funkschalter- und Empf\u00e4nger-Set\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200.jpg 1200w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2026\/06\/rz040-main-product-1200-100x100.jpg 100w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz040\/\">RZ040 Funk-Schalter- und Empf\u00e4nger-Set<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Funk-Schalter- und Empf\u00e4nger-Set zur Ein\/Aus-Lichtsteuerung im Innenbereich<\/li><li>100-230VAC, 50\/60Hz Empf\u00e4nger mit 5A Nennstrom<\/li><li>CR2032-betriebener Funkschalter mit 2,4GHz-Kommunikation<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz040\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz037-12v-24v\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"1080\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg 1080w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-100x100.jpg 100w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-12v-24v\/\">Deckenmontierter RZ037 12V\/24V DC PIR-Pr\u00e4senzmelder<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Pr\u00e4senzmodus (Auto-EIN\/Auto-AUS)<\/li><li>12\u201324V DC (10\u201330VDC), bis zu 10A<\/li><li>360\u00b0-Erfassungsbereich, 8\u201312 m Durchmesser<\/li><li>Ausschaltverz\u00f6gerung 15 s\u201330 Min.<\/li><li>Lichtsensor Aus\/15\/25\/35 Lux<\/li><li>Hohe\/Niedrige Empfindlichkeit<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-12v-24v\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_shop\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/shop.rayzeek.com\/products\/rz037\" target=\"_blank\" rel=\"nofollow noopener\">Jetzt kaufen <\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz037-10a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"1080\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg 1080w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-100x100.jpg 100w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-10a\/\">Deckenmontierter Pr\u00e4senzmelder f\u00fcr Netzspannung (RZ037-10A)<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Auto-EIN\/Auto-AUS Pr\u00e4senzmodus<\/li><li>100\u2013265V AC, 10A (Neutralleiter erforderlich)<\/li><li>360\u00b0-Erfassungsbereich; 8\u201312 m Erfassungsdurchmesser<\/li><li>Ausschaltverz\u00f6gerung 15 s\u201330 min; Lux AUS\/15\/25\/35; Empfindlichkeit Hoch\/Niedrig<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-10a\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_shop\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/shop.rayzeek.com\/products\/rz037\" target=\"_blank\" rel=\"nofollow noopener\">Jetzt kaufen <\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"swiper-slide\"><div class = \"insert_product_card_inner\"><div class = \"insert_product_card_i\"><a href=\"https:\/\/staging.rayzeek.com\/de\/products\/rz037-5a\/\"><div class = \"insert_product_card_image\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"1080\" src=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" srcset=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view.jpg 1080w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/11\/rz037-front-view-100x100.jpg 100w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-5a\/\">Deckenmontierter Netzspannungs-Pr\u00e4senzmelder (RZ037-5A)<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>Auto-EIN\/Auto-AUS Pr\u00e4senzmodus<\/li><li>100\u2013265V AC, 5A (Neutralleiter erforderlich)<\/li><li>360\u00b0-Erfassungsbereich; 8\u201312 m Erfassungsdurchmesser<\/li><li>Ausschaltverz\u00f6gerung 15 s\u201330 min; Lux AUS\/15\/25\/35; Empfindlichkeit Hoch\/Niedrig<\/li><\/ul>\r\n <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz037-5a\/\">Produktdetails 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https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-1024x1024.jpg 1024w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-300x300.jpg 300w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-768x768.jpg 768w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-150x150.jpg 150w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-12x12.jpg 12w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-100x100.jpg 100w, https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2025\/08\/rz039-1200x1200.jpg 1200w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/a><\/div><div class = \"insert_product_card_t\"><div class = \"insert_product_card_content\"><div class = \"insert_product_card_title\"><h4><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz039\/\">Funk-Bewegungsmelder-Set<\/a><\/h4><\/div><div class = \"insert_product_card_bullet_points_wrapper\"><div class = \"insert_product_card_bullet_points\"><ul><li>100V-230VAC<\/li><li>\u00dcbertragungsreichweite: bis zu 20m<\/li><li>Funk-Bewegungsmelder<\/li><li>Kabelgebundene Steuerung<\/li><\/ul> <\/div><\/div><div class = \"merged_buttons product_merged_wrapper\"><div class = \"insert_product_card_button_wrapper insert_product_product\"><div class = \"insert_product_card_button\"><a href = \"https:\/\/staging.rayzeek.com\/de\/products\/rz039\/\">Produktdetails <\/a><\/div><\/div><\/div><div class = \"merged_buttons amz_merged_wrapper\"><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The cosine law of illumination is an important concept in the lighting industry as it helps in the design and implementation of lighting systems. It allows for the calculation of illuminance based on the angle of incidence, enabling the optimization of lighting conditions for various applications. Understanding the cosine law is crucial for achieving efficient and effective lighting solutions.<\/p>\n<div class=\"insert_portfolio_outer_wrapper\"><h3>Lassen Sie sich von den Rayzeek Bewegungssensor-Portfolios inspirieren.<\/h3><p>Nicht das Richtige gefunden? Keine Sorge. Es gibt immer alternative Wege, Ihre Anforderungen zu erf\u00fcllen. Vielleicht kann eines unserer Portfolios helfen.<\/p><div class = \"insert_portfolio_buttons\"><div class = \"insert_portfolio_button_wrapper\"><div><a href = \"https:\/\/www.rayzeek.com\/product-category\/motion-sensors\"><p>PIR-Bewegungssensoren<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/motion-sensor-switches\"><p>Bewegungssensorschalter<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/occupancy-vacancy-sensors\"><p>Pr\u00e4senzmelder<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/products\/rz050\"><p>Klimaanlagen-Bewegungssensor<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/motion-sensor-light-strip\"><p>LED-Streifen mit Bewegungsmelder<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/dc-sensor-dimmer\"><p>Niedervolt-DC-Bewegungssensoren\/-Dimmer<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/wireless-motion-sensors\"><p>Kabellose Bewegungssensor-Kits<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faqs\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">H\u00e4ufig gestellte Fragen<\/h2>\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-is-the-difference-between-sine-and-cosine\">What Is the Difference Between Sine and Cosine<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Sine and cosine, also known as sin(\u03b8) and cos(\u03b8), are mathematical functions that describe the proportions of sides in a right triangle. Specifically, sin(\u03b8) represents the ratio of the length of the side opposite to the angle \u03b8 to the length of the hypotenuse, while cos(\u03b8) represents the ratio of the length of the side adjacent to the angle \u03b8 to the length of the hypotenuse.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Doesn\\&#8217;t find what you want? Don\\&#8217;t worry. There are always alternate ways to solve your problems. Maybe one of our portfolios can help.PIR Motion SensorsMotion Sensor SwitchesOccupancy Sensors&lt;<\/p>","protected":false},"author":4,"featured_media":12863,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"illuminance\", \"idxall\": 0, \"keywordtitlesimi\": 0.9325839877128601, \"keywordslugsimi\": 0.9325839877128601, \"paratitlesimi\": 0.736487865447998, \"paraslugsimi\": 0.736487865447998, \"slug\": \"what-is-illuminance\", \"title\": \"What is Illuminance\", \"id\": 13562}, {\"keyword\": \"desired illumination levels\", \"idxall\": 0, \"keywordtitlesimi\": 0.8723311424255371, \"keywordslugsimi\": 0.8723311424255371, \"paratitlesimi\": 0.7373344898223877, \"paraslugsimi\": 0.7373344898223877, \"slug\": \"what-is-level-of-illumination\", \"title\": \"What is Level of Illumination\", \"id\": 13762}, {\"keyword\": 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