Question

"Value of refractive index remains same for light rays with different wavelength and for a particular material"

• A. True
• B. False

Answer 1

The correct option is B False

Refractive index does depend on the the wavelength of light, because:

As wavelength of light decreases, the velocity of light decreases. Now, we know, absolute refractive index of a medium is equal to the (speed of light in air)/(speed of light in that medium), therefore if the velocity of light changes, the refractive index of the medium (for that wavelength of light) also changes.