How does the speed of light depend on the wavelength?

Answer 1

The equation relating the velocity, wavelength and frequency of an electromagnetic wave is given by

v=f λ

where v - velocity of the em wave

f - frequency of the em wave and

λ - wavelength of the em wave

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It is so important to know that velocity of light depends on the nature of the medium and does not depend on the wavelength.

Answer 2

The speed of light in a vacuum is constant and does not depend on the wavelength. However, in a medium other than a vacuum, the speed of light can vary depending on the wavelength due to the medium's refractive index.