Assertion :Only coherent light sources produce sustained interference. Reason: Coherent light sources emit lights of same wavelength and with a constant phase difference.

Statement I is True and Statement 2 is True and is correct explanation of Statement 1.

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Statement I is True and Statement 2 is True but not the correct explanation of Statement 1.

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Statement I is False and Statement 2 is False

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Statement I is True and Statement 2 is False

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Solution

The correct option is A Statement I is True and Statement 2 is True and is correct explanation of Statement 1.
The condition for interference is the sources should be coherent sources
Coherent sources have same wavelength and they should always have same phase difference.
so the second statement is a reason for first statement

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Similar questions

STATEMENT-1 : 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.
STATEMENT-2 : For two waves from coherent point sources to interfere constructively at a point, the magnitude of their phase difference at that point must be $2 m π$ ( where m is a nonnegative integer).

Statement - I: $C l^{-} a n d C a^{2 +}$ are isoelectronic species.
Statement - II: Isoelectronic species should have same charges.