News tagged with light

Related topics: wavelength · solar cells · laser · physical review letters · photons

Light up the holidays safely

(HealthDay)—Colorful lights and candles can make the holidays sparkle, but child safety should be a priority when decking the halls or trimming a tree, a leading pediatricians' group says.

Dec 20, 2017
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Amber-tinted glasses may provide relief for insomnia

How do you unwind before bedtime? If your answer involves Facebook and Netflix, you are actively reducing your chance of a good night's sleep. And you are not alone: 90 percent of Americans use light-emitting electronic devices, ...

Dec 15, 2017
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Light

Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

This text uses material from Wikipedia, licensed under CC BY-SA

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