Q.No.132: - What will be the effect on the measure of dielectric constant if light with high frequency (electromagnetic wave with varying E and B field) passes through the material medium?

Q.No.132: - What will be the effect on the measure of dielectric constant if light with high frequency (electromagnetic wave with varying E and B field) passes through the material medium?

Ans: - When we apply a field varies at high frequency then the dipoles may not have time to respond and we can’t use the static dielectric constants in the case of a rapidly varying E and B field. Further more the value of dielectric constant varies with frequency, so that the speed of light in matter depends on the wavelength or frequency of light.