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


Or


vv < vr


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


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