A narrow beam of monochromatic light is incident normally on a diffraction grating. Third order diffracted beams are formed at angles of 45degrees to the original direction. What is the highest order of diffracted beam produced by this grating?

Please explain how to to get to the answer along with giving it.

Question

A narrow beam of monochromatic light is incident normally on a diffraction grating. Third order diffracted beams are formed at angles of 45degrees to the original direction. What is the highest order of diffracted beam produced by this grating? 

Please explain how to to get to the answer along with giving it.

anonymous · Answer

@Taufique can you help here as well?

anonymous · Answer

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