Part A

A beam falls on the edge between two media at an angle of incidence which is smaller than the critical angle $51\mathrm{.}0\backslash$deg $.$ How does the wavelength of the beam change when it enters the next medium $($with a smaller index of refraction$)?$

$(\backslash$lambda $\_(2))/(\backslash$lambda $\_(1))=$

Incorrect; Try Again; $3$ attempts remaining