A helium-neon laser lambda 6328 nanometer is used to
A helium-neon laser (λ = 632.8 nanometer) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.1 degree, determine the spacing between adjacent grooves in the grating?
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a helium-neon laser lambda 6328 nanometer is used to calibrate a diffraction grating if the first-order maximum occurs
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