The short wavelengths of the color blue are dispersed more by the molecules in the atmosphere than longer wavelengths of visible light, which is why we say the sky is blue. If blue light has a wavelength of 450 nm, is the wavelength of red light greater or less than 450 nm?

Visible light

Solution

The wavelength of red light is greater than that of blue light, which means that the wavelength of red light is greater than 450 nm.