White light (400–700 nm) passes through a glass of refractive index 1.…

Question

White light (400–700 nm) passes through a glass of refractive index 1.55. The wavelength range observed in the glass becomes approximately:

Accepted Answer

B. 258–451 nm

$\lambda_{glass} = \lambda_0/n$.
So 400/1.55 ≈ 258 nm and 700/1.55 ≈ 451 nm.
Wavelengths shorten in proportion.

Answer

400–700 nm

Answer

620–1085 nm

Answer

Cannot be determined

White light (400–700 nm) passes through a glass of refractive index 1.55. The wavelength range observed in the glass becomes approximately: