Physics

Monochromatic light of wavelength 550 nm passes through a diffraction grating that has 55000 lines/m. A bright line appears on the screen at an angle of 12.23o from the central bright fringe. What is the order of this bright line?

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asked by Ashley
  1. dsin12.23 = ml, m = 0, 1, 2, ….`

    where l = 550 * 10^-9 m
    d = 1/55000

    solve for m

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