The solution of the problem 3.40 кр 3 from the problem

The solution of the problem 3.40 кр 3 from the problem

Task 3.40
The distance between the atomic planes of the calcite crystal is 0.3 nm. Determine at what wavelength of X-rays the second diffraction maximum will be observed when the rays are reflected at an angle of 45 ° to the surface of the crystal.