prism
The Figure above shows how the electromagnetic spectrum displays a wide variation in wavelength and frequency. Radio waves have wavelengths of as long as hundreds of meters, while the wavelength of gamma rays are on the order of 10 -12 m. The corresponding frequencies range from 10 6 to 10 21 Hz. Visible light can be split into colors with the use of a prism Figure below , yielding the visible spectrum of light. Red light has the longest wavelength and lowest frequency, while violet light has the shortest wavelength and highest frequency. Visible light wavelength ranges from about 400 700 nm with frequencies in the range of 10 14 Hz.