Q142 / 150 · MHT CET 2021 (22 Sep Shift 2) · Physics

If two sources emit light waves of different amplitudes then

A
brightness of fringes is less
B
fringes disappear after short time
C
fringe width is less
Correct answer
D
there is some intensity of light in the region of destructive interference

Solution

If amplitudes are different, then in the region of destructive interference, the two waves do not cancel each other completely, hence there is some intensity or light.

Hence, the correct answer is option: 'D'.

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