A diffraction grating is illuminated with yellow light. The diffraction pattern seen on a viewing screen consists of three yellow bright spo

Question

A diffraction grating is illuminated with yellow light. The diffraction pattern seen on a viewing screen consists of three yellow bright spots, one at the central maximum (θ = 0°) and one on either side of it at θ = ±50°. Then the grating is simultaneously illuminated with red light. Where a red and a yellow spot overlap, an orange spot is produced. The new pattern consists of __________

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Acacia 4 years 2021-07-20T06:13:33+00:00 1 Answers 76 views 0

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    2021-07-20T06:15:18+00:00

    Answer:

    an orange fringe at 0°, yellow fringes at ±50° and red fringes farther out.

    Explanation:

    In the visible spectrum- red to violet, red has the highest wavelength.

    The maximum internsity  for diffraction grating is given by,

    Sinθ(_{max} ) = mλ/d

    It is concluded that the angle of diffraction increases with increase in wavelength’λ’ .  So, red fringe will be farthest from the center, orange light will be at the center and yellow fringe will be at 50°.

    Therefore, The new pattern consists of : an orange fringe at 0°, yellow fringes at ±50° and red fringes farther out.

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