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When Light enters from Air to denser medium having Refractive index n Then Wavelength of Light?

When Light enters from Air to denser medium having Refractive index n Then Wavelength of Light?
 

Grade:12th pass

1 Answers

RAHUL ROHILLA
askIITians Faculty 873 Points
5 years ago
We know that the frequency of the wave remains constant when the wave is traveling from one medium to another.

It is also known relation that:

Velocity of the wave = frequency x wavelength

From here, we know that velocity of wave changes and frequency doesn't. Hence the wavelength should change for the equation to be true. It is this change that causes refraction of light.

As the wave is traveling from a rarer medium to a denser medium.

Velocity of the light decreases, frequency remains same and hence wavelength decreases

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