If Light from a 560-Nm Monochromatic Source in Air Is $\degree$

Multiple Choice

If light from a 560-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56) at an angle of 60 $\degree$ ,what is the wavelength of the ray refracted within the quartz?

A) 192 nm
B) 359 nm
C) 560 nm
D) 874 nm