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A diffraction grating has 6000 lines per centimeter ruled on it. What is the angular separation...

A diffraction grating has 6000 lines per centimeter ruled on it. What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 500 nm?
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1cm 6000 grating element d= = 1.666x10cm -1.666x166m wavelength =500mm=500x10am Condition for and order, dsind=2d = sino = si

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