C.3.9 Diffraction Gratings – Check yourself

For a given grating, which colour has the largest angle for first order?

A grating has d = 2.2 µm and is used with light of wavelength 500 nm at normal incidence. The highest order seen is

With more slits illuminated, the maxima become

With white light, the central (zeroth) order appears

λ = 600 nm, d = 3.0 µm. The angle of the second order satisfies sin θ =