monochromatic light from a helium-neon laser(=642. | Cheap Nursing Papers

monochromatic light from a helium-neon laser(=642.

monochromatic light from a helium-neon laser(=642.8nm) is incident normally on a difraction grating containing 6000 groves per centimeter find the angles at which the first-and second-order maxima are observed.

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