Violet light has the most energy per photon of any visible color of light with a wavelength of about 400 nm. Ultraviolet light has an even smaller wavelength and as a result, more energy per photon, but it is invisible to the human eye.Know More
The spectrum of visible light runs from violet to red. It is banded on either side by ultraviolet and infrared, colors which human beings cannot perceive unassisted. Red light has the longest wavelength with about 650 nm. There are many other colors which human beings cannot perceive but which are measurable through instrumentation.
Other colors of the spectrum and their wavelengths include:
Different wavelengths of light scatter differently through varying mediums, most noticeably Earth's atmosphere. The sky appears blue both because the sun releases a great deal of blue light and because blue light scatters upon contact with Earth's atmosphere, diffusing through it and influencing human perception heavily.
Ultraviolet light is so powerful that it can cause sunburns by destroying and breaking down cellular structures. This is its most visible impact on daily human life and the most easily measured by its perceivable influences.Learn more about Colors
Blue is a primary color and cannot be created by mixing other colors. A light blue paint is made by mixing blue with enough white to reach the desired tint. Adding blue to a light green paint will produce a green-blue tint.Full Answer >
The basic properties of light are its wavelength, frequency, energy and speed. Light is composed of energy particles called photons and can behave as either a wave or as separate particles.Full Answer >
Infrared is energy with a longer wavelength than visible light, existing just outside the range of human vision. The sun is a natural source of infrared energy, as well as many other forms of energy from across the electromagnetic spectrum. Flames also produce infrared, frequently putting out more infrared waves than visible light.Full Answer >
When heated or exposed to electricity, the electrons in atoms of a given element gain energy and move to a higher energy level or orbit; they do not maintain this position but re-emit the energy as light of a specific wavelength, generating color. For elements in a solid or liquid state, this light generally appears as a rainbow while elements in a gaseous state reveal their atomic emission spectra, the specific bands of color produced by that elements particular electron configuration.Full Answer >