If light from a 336-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60°,what is the wavelength of the ray refracted within the quartz?
A)138 nm
B)215 nm
C)524 nm
D)818 nm
E)336 nm

Question

Quizplus · Accepted Answer

The wavelength of the light within the quartz can be found using Snell's law and the relationship between the speed of light, wavelength, and refractive index. The refractive index of air is approximately 1. The formula relating the wavelength in vacuum (or air) ($\lambda_0$) to the wavelength in the medium ($\lambda$) is given by $\lambda = \lambda_0 / n$, where $n$ is the refractive index of the medium. Substituting the given values, $\lambda = 336\,nm / 1.56 = 215.38\,nm$, which rounds to 215 nm.

If Light from a 336-Nm Monochromatic Source in Air Is