The wavelength of the laser beam used in a compact disc
Chapter , Problem 47(choose chapter or problem)
The wavelength of the laser beam used in a compact disc player is 780 nm. Suppose that a diff raction grating produces fi rst-order tracking beams that are 1.2 mm apart at a distance of 3.0 mm from the grating. Estimate the spacing between the slits of the grating
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