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BITSAT 2019
Exam
BITSAT
Year
2019
Subject
Physics
Chapter
Wave Optics

BITSAT 2019 · Physics · Wave Optics

Two monochromatic light waves are travelling with same frequency...

Two monochromatic light waves are travelling with same frequency and constant phase difference. If both waves interfere,& then

Options

  1. Athere is a gain of energy
  2. Bthere is a loss of energy
  3. Cthe energy is redistributed and the distribution remains constant in time
  4. Dthe energy is redistributed and the distribution changes with time

Correct answer

C. the energy is redistributed and the distribution remains constant in time

Step-by-step solution

When two waves with same frequency and constant phase difference interfere to each other, then after interference, intensity of resultant wave is distributed such that it is maximum at some points [constructive interference or bright fringes] and minimum at another points. [destructive interference or dark fringes]. Hence, energy is distributed and remains constant [in the form of bright and dark fringes]
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