Red is the color on the visible electromagnetic spectrum that has the longest wavelength. The wavelength of red on the spectrum is 700 nanometers. Conversely, the color with the shortest wavelength is violet at 400 nanom... More »

Violet light has the shortest wavelength of about 400 nanometers. Red light has the longest with a wave length of about 650 nanometers. In between, from shortest to longest, is indigo, blue, green, yellow and orange ligh... More » Science Colors

The wavelengths of the colors of the rainbow range from 390 nanometers to 780 nanometers. There are wavelengths that are lower or higher than those in the visible spectrum, and several types of radiation are simply light... More »

No combination of other colors can be used to make white paint because any other color of paint absorbs some of at least one particular wavelength. Combining paints or filters to form other colors is known as subtractive... More »

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 t... More »

Light's color is determined by the wavelength of the light energy striking the eye. The eye contains three kinds of cells that are specialized for picking up only certain wavelengths of light. When this information is re... More »

A false color image is an image that uses visible colors to represent portions of the electromagnetic spectrum outside the typical range of vision. This allows the image to provide data that is otherwise invisible to the... More »