For a wavelength of 420 nm, a diffraction grating produces
Chapter 27, Problem 27.90(choose chapter or problem)
For a wavelength of 420 nm, a diffraction grating produces a bright fringe at an angle of 26. For an unknown wavelength, the same grating produces a bright fringe at an angle of 41. In both cases the bright fringes are of the same order m. What is the unknown wavelength? 4
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