Задача 40172.

A normally parallel beam of white light rays is incident on a diffraction grating. The second and third order spectra partially overlap each other. At what wavelength in the second-order spectrum does the violet boundary (4000 A) of the third-order spectrum overlap?

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
If you have any questions regarding the solution, please write. I try to help.