5/25/2023 0 Comments Relative to its average speed in air, the average speed of a beam of light in glass isBlue and purple light have short waves, around 400 nm. Red light has relatively long waves, around 700 nm long. Our eyes perceive different wavelengths of light as the rainbow hues of colors. Light waves have wavelengths between about 400 and 700 nanometers (4,000 to 7,000 angstroms). Visible light is just one of many types of EM radiation, and occupies a very small range of the overall electromagnetic spectrum but because we can see light with our eyes, it has special significance to us. Light waves are the result of vibrations of electric and magnetic fields, and are thus a form of electromagnetic (EM) radiation. Visible light is one way energy moves around. Rainbows show how visible light is a combination of many colors.
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