Diffraction grating produces its third-order bright band at an angle of 79.4 degrees for light of wavelength 731nm .
a.) Find the number of slits per centimeter for the grating.(in slits/cm)
b.) Find the angular location of the first-order bright band.(in degrees)
c.) Find the angular location of the second-order bright band.(in degrees)
d.) Will there be a fourth-order bright band? (yes or no)