Electromagnetic radiation (EMR) is a stream of photons each traveling at the speed of light. Photons are massless bundles of light energy. The higher the energy of photons the more they behave as particles and can be harmful. The symbol shown with what looks like three blades of a fan notifies you that the radiation […]
Fluorescence
Question: What causes some objects to glow under a black light? Black lights give off Ultraviolet A light, which is a type of high-energy invisible light (radiation). Photons are packets of light energy. UV light photons have a higher energy than do the photons for visible light. Materials that glow under a black light contain […]
Flame Colors:Photons
When you see colors, it is because some form of visible light has entered your eye and was absorbed by special light sensitive cells inside your eyes.