{"id":14080,"date":"2023-09-17T23:21:43","date_gmt":"2023-09-17T23:21:43","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=14080"},"modified":"2023-12-26T08:44:00","modified_gmt":"2023-12-26T08:44:00","slug":"what-is-light","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/sv\/glossary\/what-is-light\/","title":{"rendered":"Vad \u00e4r ljus"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-light\">Vad \u00e4r ljus<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Ljus, i belysningssammanhang, avser elektromagnetisk str\u00e5lning som \u00e4r synlig f\u00f6r det m\u00e4nskliga \u00f6gat. Det \u00e4r en form av energi som g\u00f6r det m\u00f6jligt f\u00f6r oss att uppfatta v\u00e5r omgivning och spelar en avg\u00f6rande roll f\u00f6r belysning och synintryck. Ljus kan s\u00e4ndas ut, absorberas eller reflekeras av olika k\u00e4llor, b\u00e5de naturliga och konstgjorda, s\u00e5som solljus, gl\u00f6dlampor och flammor.<\/p>\n<div class=\"insert_inquiry_outer_wrapper\"><h3>Letar du efter r\u00f6relsestyrda energisparande l\u00f6sningar?<\/h3><p>Kontakta oss f\u00f6r kompletta PIR-r\u00f6relsesensorer, r\u00f6relseaktiverade energisparprodukter, r\u00f6relsesensorbrytare och kommersiella l\u00f6sningar f\u00f6r n\u00e4rvaro\/fr\u00e5nvaro (Occupancy\/Vacancy).<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Skicka ett e-postmeddelande<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/contact\"><p>Kontaktformul\u00e4r<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Chatta online<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Ljusets hastighet i vakuum \u00e4r en fundamental konstant som \u00e4r definierad till exakt 299 792 458 meter per sekund. Detta fasta v\u00e4rde fungerar som en referens vid vetenskapliga ber\u00e4kningar. Ljusets hastighet kan dock variera n\u00e4r det f\u00e4rdas genom olika transparenta \u00e4mnen som inneh\u00e5ller vanlig materia. I vatten \u00e4r till exempel ljusets hastighet cirka 3\/4 av dess hastighet i vakuum.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Genom historien har forskare utf\u00f6rt experiment f\u00f6r att m\u00e4ta ljusets hastighet. Tidiga f\u00f6rs\u00f6k gjordes av Galileo och Ole R\u00f8mer p\u00e5 1600-talet, d\u00e4r R\u00f8mer uppskattade en hastighet p\u00e5 227 000 000 meter per sekund om han hade k\u00e4nt till den exakta storleken p\u00e5 jordens omloppsbana. Efterf\u00f6ljande experiment av Hippolyte Fizeau, L\u00e9on Foucault och Albert A. Michelson f\u00f6rfinade m\u00e4tningen ytterligare, vilket ledde till ett exakt v\u00e4rde p\u00e5 299 796 000 meter per sekund.<\/p>\n<div class=\"insert_portfolio_outer_wrapper\"><h3>Hitta inspiration i Rayzeeks portf\u00f6lj av r\u00f6relsesensorer.<\/h3><p>Hittar du inte det du s\u00f6ker? Oroa dig inte. Det finns alltid alternativa s\u00e4tt att l\u00f6sa dina problem. Kanske kan n\u00e5gon av v\u00e5ra portf\u00f6ljer hj\u00e4lpa till.<\/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-r\u00f6relsesensorer<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/motion-sensor-switches\"><p>R\u00f6relsesensorbrytare<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/occupancy-vacancy-sensors\"><p>N\u00e4rvarovakter<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/products\/rz050\"><p>R\u00f6relsesensor f\u00f6r luftkonditionering<\/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-strips med r\u00f6relsevakt<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/dc-sensor-dimmer\"><p>L\u00e5gsp\u00e4nnings-DC-r\u00f6relsesensorer\/dimrar<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/wireless-motion-sensors\"><p>Tr\u00e5dl\u00f6sa r\u00f6relsesensorkit<\/p><\/a><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Kontakta oss f\u00f6r kompletta PIR-r\u00f6relsesensorer, r\u00f6relseaktiverade energisparprodukter, r\u00f6relsesensorstr\u00f6mbrytare och kommersiella l\u00f6sningar f\u00f6r n\u00e4rvaro\/fr\u00e5nvaro (Occupancy\/Vacancy).Skicka ett e-postmeddelandeKontaktformul\u00e4r&lt;<\/p>","protected":false},"author":4,"featured_media":12868,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"illumination\", \"idxall\": 0, \"keywordtitlesimi\": 0.923406720161438, \"keywordslugsimi\": 0.923406720161438, \"paratitlesimi\": 0.7529364824295044, \"paraslugsimi\": 0.7529364824295044, \"slug\": \"what-is-illumination\", \"title\": \"What is Illumination\", \"id\": 13577}, {\"keyword\": \"incandescent light bulbs\", \"idxall\": 0, \"keywordtitlesimi\": 0.8720098614692688, \"keywordslugsimi\": 0.8720098614692688, \"paratitlesimi\": 0.6013749539852142, \"paraslugsimi\": 0.6013749539852142, \"slug\": \"light-bulbs-buyers-guide\", \"title\": \"Light Bulbs Buyers Guide\", \"id\": 8717}, {\"keyword\": \"illumination\", \"idxall\": 0, \"keywordtitlesimi\": 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