A light ray incident on a slab of refractive index $\frac { 3 } { 2 }$. If wavelength of refracted ray is $\mathbf { 5 2 0 ~ n m }$. Find wavelength of incident ray. (A) 780 nm (B) 560 nm (C) 1460 nm (D) 360 nm
A light ray incident on a slab of refractive index $\frac { 3 } { 2 }$. If wavelength of refracted ray is $\mathbf { 5 2 0 ~ n m }$. Find wavelength of incident ray.
(A) 780 nm
(B) 560 nm
(C) 1460 nm
(D) 360 nm