{"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\/th\/glossary\/what-is-light","title":{"rendered":"What is Light"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-light\">What is Light<\/h2><p>Light, in the context of the lighting, refers to electromagnetic radiation that is visible to the human eye. It is a form of energy that enables us to perceive our surroundings and plays a crucial role in illumination and visual perception. Light can be emitted, absorbed, or reflected by various sources, both natural and artificial, such as sunlight, incandescent light bulbs, and flames.<\/p><div class=\"insert_inquiry_outer_wrapper\"><h3>Looking For Motion-Activated Energy-Saving Solutions?<\/h3><p>Contact us for complete PIR motion sensors, motion-activated energy-saving products, motion sensor switches, and Occupancy\/Vacancy commercial solutions.<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Send an Email<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/contact\"><p>Contact Form<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Chat Online<\/p><\/a><\/div><\/div><\/div><\/div><p>The speed of light in vacuum is a fundamental constant, defined to be exactly 299,792,458 meters per second. This fixed value serves as a reference in scientific calculations. However, the speed of light can vary when it travels through different transparent substances containing ordinary matter. For example, in water, the speed of light is about 3\/4 of its speed in vacuum.<\/p><p>Throughout history, scientists have conducted experiments to measure the speed of light. Early attempts were made by Galileo and Ole R\u00f8mer in the 17th century, with R\u00f8mer estimating a speed of 227,000,000 meters per second if he had known the exact size of Earth&#8217;s orbit. Subsequent experiments by Hippolyte Fizeau, L\u00e9on Foucault, and Albert A. Michelson further refined the measurement, leading to a precise value of 299,796,000 meters per second.<\/p><div class=\"insert_portfolio_outer_wrapper\"><h3>Get Inspired by Rayzeek Motion Sensor Portfolios.<\/h3><p>Doesn't find what you want? Don't worry. There are always alternate ways to solve your problems. Maybe one of our portfolios can help.<\/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 Motion Sensors<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/motion-sensor-switches\"><p>Motion Sensor Switches<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/occupancy-vacancy-sensors\"><p>Occupancy Sensors<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/products\/rz050\"><p>Air Conditioner Motion Sensor<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/motion-sensor-light-strip\"><p>Motion Sensor Light Strips<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/dc-sensor-dimmer\"><p>Low-voltage DC Motion Sensors\/Dimmers<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/wireless-motion-sensors\"><p>Wireless Motion Sensor Kits<\/p><\/a><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Light, in the context of the lighting, refers to electromagnetic radiation that is visible to the human eye. 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