posted by Ashley .
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?
dsin12.23 = ml, m = 0, 1, 2, â€¦.`
where l = 550 * 10^-9 m
d = 1/55000
solve for m