Задача 40868.

A transparent diffraction grating has a period of 1.5 microns. Find the angular dispersion D (c ang / nm) corresponding to the maximum spectral line of the highest order with lambda = 530 nm when light is incident on the grating: normal; at an angle of 45 ° to the normal.

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.