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?
Choose one answer.
a. 5
b. 6
c. 7
d. 8

  1. 0
  2. 0
  3. 8
asked by ashley --
  1. noooob

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    posted by me
  2. i dont think youre a noob :)

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    posted by Anonymous

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