74. A narrow beam of monochromatic light is incident normally on a diffraction grating. Third-order diffracted beams are formed at angles of 45° to the original direction. What is the highest order of diffracted beam produced by this grating? A. 3rd B. 4th C. 5th D. 6th
74. A narrow beam of monochromatic light is incident normally on a diffraction grating. Third-order diffracted beams are formed at angles of 45° to the original direction. What is the highest order of diffracted beam produced by this grating? A. 3rd B. 4th C. 5th D. 6th
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![74. A narrow beam of monochromatic light is incident normally on a diffraction grating. Third-order
diffracted beams are formed at angles of 45° to the original direction. What is the highest order of
diffracted beam produced by this grating?
A. 3rd
B. 4th
C. 5th D. 6th](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5a6d9c67-6f13-49d2-ac4d-2d996f90a88b%2F0ecf0fa4-e288-489d-89f6-e02b45839566%2Ftczndw9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:74. A narrow beam of monochromatic light is incident normally on a diffraction grating. Third-order
diffracted beams are formed at angles of 45° to the original direction. What is the highest order of
diffracted beam produced by this grating?
A. 3rd
B. 4th
C. 5th D. 6th
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