Question

Suppose that you are given a monochromatic light source of wavelength 600 nm, and a diffraction
grating with 500 lines.mm1
. How many full orders will be visible for a normal incidence
experiment? (Hint: the maximum possible angle for diffraction is 90°).

Answer 1

Full number of orders=3, and a total of 7 images of the source can be seen( three on each side of a central image)