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- Ultraviolet (UV) Radiation and Your Health - University of Rochester ...The Earth’s atmosphere absorbs UVC rays before they reach us. How UV rays affect your health. In most people, UV rays activate a chemical in the skin called melanin. This is the skin's first defense against the sun. Melanin absorbs the dangerous UV rays that can do serious skin damage. This is the process that gives you a tan.
- Sunlight | Definition, Wavelengths, & Facts | Britannicasunlight, solar radiation that is visible at Earth’s surface. The amount of sunlight is dependent on the extent of the daytime cloud cover.
- Solar radiation | UV Rays, Photons, Electromagnetic Waves | BritannicaSolar radiation, electromagnetic radiation, including X-rays, ultraviolet and infrared radiation, and radio emissions, as well as visible light, emanating from the Sun. Of the 3.8 × 1033 ergs emitted by the Sun every second, about 1 part in 120 million is received by its attendant planets and their
- Sunlight - WikipediaSunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon.
- How Long Does It Take Sunlight To Reach Earth? - WorldAtlasDistance To The Sun It takes approximately 8-minutes for sunlight to reach Earth. The Earth orbits the sun at an average distance of 93-million miles (150-million kilometres). At this distance, there is a noticeable delay in when light emitted by the sun reaches our world.
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