Question: A grating that contains 1 2 5 0 grooves / mm is irradiated with a Polychromaticbeam at an incident angle 6 0 deg to

A grating that contains 1250 grooves/mm is irradiated with a Polychromaticbeam at an incident angle 60\deg to the grating normal. Calculate the Wavelengths of radiation that would appear at an angle of reflection of +40\deg ,+30\deg ,+20\deg ,+10\deg and 0\deg .[Consider the order of interference as 4

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