Question

A light of wavelength 6000Å incident on a convex lens of its refractive

index 1.5 and is placed in a liquid of same refractive index as the lens,

since the light passes parallel to principal axis after refraction. The

wavelength of refractive light will be​

Answer 1

Explanation:

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.