Suppose a monochromic light strikes a grating at normal incidence. The first order diffractions lines appear at the angle 23° with respect to the normal. If the grating has 6200 lines per centimeter, what is the frequency of the light that passes through?
THz
If this same monchromatic light where to strike the grating when it is immersed in a 50% sugar solution with a refractive index of 1.42, at what angle would the first order diffraction appear?
°