72. What is the constant grating if it will resolve in the first order spectral lines of potassium λ1 = 4044 ∙ 10-10 m, λ2 = 4047 ∙ 10-10 m? The width of the lattice ℓ = 3 cm.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)