Problem 40329.
A beam of light falls normally on a diffraction grating. The sodium line (lambda = 589 nm) gives a diffraction angle of 17°8´ in the first order spectrum. A certain line gives a diffraction angle of 24°12´ in the second-order spectrum. Find the wavelength of this line and the number of lines N0 per unit grating length.
Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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