Question

An 18mm wide diffraction grating has rulings of 390 lines per mm. monochromatic light of 487 nm wavelength is incident normally on the grating.

question 1) at what angle away from the normal (where the central maximum of the diffraction pattern occurs) is the next intensity maximum?

 

question 2) what is the largest order, m, that existsfordiffraction of this wavelength with this grating?

 

question 3) what is the largest angle from the norma atwhichan intensity maximum is formed?

 

question 4) what is the chromatic resolving power ofthisgrating if it is used in second order (m=2) assuming that thefullgrating is illuminated?

 

question 5) what is the chromatic resolving power ofthisgrating if it is used in second order assuming that theincidentbeam is only illuminating 2mm of the grating?