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Optical Density

"Value of ref...

Question

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

A

True

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B

False

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Solution

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.

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