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A parallel beam of monochromatic light is incident on a plane transmission grating having 3000 lines/cm

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by (98.9k points) in Engineering Physics 2 746 views
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A parallel beam of monochromatic light is incident on a plane transmission grating having 3000 lines/cm. A third order diffraction is observed at 30o.Calculate the wavelength of monochromatic light

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wavelength is 5555 Ao

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