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 »

www.reference.com Science Colors

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 »

The wavelength of ultraviolet light is 400 nanometers or less. Visible light and color range from 400 nanometers to 750 nanometers. The region just below the visible wavelength is called near ultraviolet. More »

www.reference.com Science Physics Optics & Waves

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 »

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 »

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 »

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 »