Chameleon Dyes Note: I am revising the following information. I had the opportunity to speak with one of the directors of LCR Hallcrest, a company that makes chameleon dyes. The pencils in the picture are called chameleon pencils. While chameleons change colors in response to different stimuli, such as temperature, emotions, and illness, the dye […]
Perception of Color
Vision depends on a small part of the Electromagnetic Spectrum Called Visible Light. The only type of light energy that you can visually perceive is called visual light. Visual light can be broken into seven parts, each part with a different amount of energy, and each amount of energy is perceived as a different color. […]
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.
Black Light
What is a Black Light? What are Phosphors? “Black Light” seems to be an erroneous name because when a black light is turned on in a dark room, everything is bathed in a beautiful purple color. But what you do not see is the ultraviolet radiation that is being emitted. In black lights, the radiation […]