Physics, 21.12.2020 18:10 haileysolis5

A diffraction grating with 68 slits per cm is used to measure the wavelengths emitted by hydrogen gas. A. At what angles in the fourth-order spectrum would you expect to find the two violet lines of wavelength 434 nm and of wavelength 410 nm?
B. What are the angles if the grating has 12,800 slits per cm?

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