The UV Index measures the ultraviolet radiation coming from the sun. There are three primary types of UV radiation: ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

Photons are odd little beasts. They can act like waves. They can act like particles. They are teeny tiny messengers of force. They are carriers of energy. If you're enjoying this article, consider ...

Red light therapy is an anti-aging treatment that dermatologists love, so we asked them about how it works, its benefits and what devices to try.