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A : Two coherent point sources of light having nonzero phase difference are seperated by small distance. Then on the perpendicular bisector of line segment joining both the point sources, constructive interference cannot be obtained.
R : For two waves from coherent point sources to interfere constructively at a point, their phase difference at that point must be nπ (where n is an integer). 
  • a)
    Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
  • b)
    Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion
  • c)
    Assertion is True, Reason is False
  • d)
    Assertion is False, Reason is False 
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A : Two coherent point sources of light having nonzero phase differenc...
Consider light from two sources A and B, travelling to interference on the screen in between them at equal distances from them.
The rays travel equal path = √d^2 + x^2 ​ to meet at any point D on the screen.
So they do not have any path difference between them. But they have a constant non zero phase difference.
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Most Upvoted Answer
A : Two coherent point sources of light having nonzero phase differenc...
Assertion and Reason Explanation:

Assertion: False

Reason: False
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Explanation:
Constructive interference occurs when two waves from coherent sources meet at a point with a path difference that is an integer multiple of the wavelength. In this case, the phase difference between the two waves must be a multiple of 2π for constructive interference to occur.

Assertion is False:
In the scenario described where two coherent point sources have a nonzero phase difference and are separated by a small distance, constructive interference cannot be achieved on the perpendicular bisector of the line joining them. This is because for constructive interference to occur, the phase difference between the two waves must be a multiple of 2π, which is not the case when there is a nonzero phase difference between the sources.

Reason is False:
The reason provided in the statement is incorrect because it does not accurately explain why constructive interference cannot be obtained in the given scenario. The key factor preventing constructive interference is the nonzero phase difference between the two sources, not just the requirement of a phase difference of nπ for constructive interference to occur.
Therefore, the assertion is false, and the reason is also false as it does not correctly explain the situation.
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A : Two coherent point sources of light having nonzero phase difference are seperated by small distance. Then on the perpendicular bisector of line segment joining both the point sources, constructive interference cannot be obtained.R :For two waves from coherent point sources to interfere constructively at a point, their phase difference at that point must be nπ (where n is an integer).a)Assertion is True, Reason is True; Reason is a correct explanation for Assertion.b)Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertionc)Assertion is True, Reason is Falsed)Assertion is False, Reason is FalseCorrect answer is option 'D'. Can you explain this answer?
Question Description
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