Question

Which of the following is a correct statement? (1 point) Two waves of the same frequency...

Which of the following is a correct statement? (1 point)

  1. Two waves of the same frequency interfere
    constructively only if their path difference
    is an even integral multiple of their
    wavelength.
  2. Two waves of the same frequency inerfere
    destructively if their phase difference is
    an odd integral multiple of 180�
  3. Two waves of the same frequency interfere
    destructively only if their path difference
    is an odd integral multiple of their wavelength.
  4. None of the other choices are correct.
  5. Two waves of the same frequency interfere
    constructively only if their phase
    difference is 0�
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Answer #1

correct option is part (B)

Two waves of the same frequency inerfere destructively if their phase difference is an odd integral multiple of .

because in destructive interference two waves combines in the opposite phase, hence phase difference must be equal to  , , ,....and so on.

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