Question
Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
Solution
Indeed, the colour of the light influence the refractive index and speed of light in a medium. That is, both of them depends on the wavelength of the light.
We know that, μ > μr.
Hence, vviolet < vred.
Thus, the violet component of white light travels slower in prism as compared to the red light.
We know that, μ > μr.
Hence, vviolet < vred.
Thus, the violet component of white light travels slower in prism as compared to the red light.
