Light of wavelength 530 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sinθ = 0.2 and sinθ = 0.3, respectively. The fourth-order maxima are missing.
(a) What is the separation between adjacent slits?
____ m
(b) What is the smallest slit width this grating can have?
____ m
(c) For that slit width, what are the largest, second largest, and third largest values of the order number m of the maxima produced by the grating?