The solution of the problem 3.35 кр 3 from the problem

The solution of the problem 3.35 кр 3 from the problem

Task 3.35
The constant of the diffraction grating is 5 μm. Determine the largest order of the spectrum, the total number
Main maxima in the diffraction pattern and the diffraction angle in the fourth-order spectrum at
Normal incidence of monochromatic light with a wavelength of 0.625 μm?