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For sustained interference we need two sources which emit waves:​
  • a)
    with same amplitude
  • b)
    with same intensity
  • c)
    in a narrow beam
  • d)
    having constant phase difference
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
For sustained interference we need two sources which emit waves:​...
Two sources are said to be coherent when the waves emitted from them have the same frequency and constant phase difference. Interference from such waves happen all the time, the randomly phased light waves constantly produce bright and dark fringes at every point.
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Most Upvoted Answer
For sustained interference we need two sources which emit waves:​...
To obtain well-defined interference patterns, the intensity at points corresponding to destructive interference must be zero, while intensity at the point corresponding to constructive interference must be maximum. To accomplish this the necessary condition is that the two interference sources must be coherent, that is, they must keep a constant phase difference.
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For sustained interference we need two sources which emit waves:​a)with same amplitudeb)with same intensityc)in a narrow beamd)having constant phase differenceCorrect answer is option 'D'. Can you explain this answer?
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