Q. 3 B4.3( 22 Votes )

Is the speed of l

Answer :

Speed of light in glass is dependent on the colour of light as different colours have different wavelengths, thus different velocities.

We know that refractive index of a material in terms of the wavelength of light is

μ = a + (b/λ2)

As the wavelength of violet light is smaller than that of red light,

μv > μr.

We also know that


vv < vr

Hence velocity of violet light in glass is less than velocity of red light.

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