Task 40962.

Light with a wavelength of 420 nm is refracted at the interface between two media. Angle of incidence 45 ° angle of refraction 30 °. How to change the length of the light wave?
Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
If you have any questions about the decision, write. I will try to help.