If the two sources of light emit waves of different amplitudes and interfere then (a) there is some intensity of light in the region of destructive interference. (b) fringe width is less. (c) brightness of fringes is less. (d) fringes disappear after short time.

Answer: (a). At destructive interference the resultant amplitude is |A₁ - A₂|. If A₁ ≠ A₂, this is not zero, so dark fringes are not completely dark. So the answer is (a).

If the two sources of light emit waves of different amplitudes and… | MHT CET 2025 (25 Apr, Shift 1)

Q20MHT CET 2025 · 25 APR · SHIFT 1Easy

Superposition, Coherence & Intensity

If the two sources of light emit waves of different amplitudes and interfere then

Show answer and solution

Answer: (a)

At destructive interference the resultant amplitude is $|A_1 - A_2|$ .
If $A_1 \ne A_2$ , this is not zero, so dark fringes are not completely dark.
So the answer is (a).

Report a mistake

More questions on Superposition, Coherence & Intensity

In a Young's double slit experiment, the source is white light. One of the slits is…JEE Main 2025 (8 Apr, Shift 2)
In Young's double slit experiment, for the n th dark fringe ( n = 1, 2, 3) the phase…MHT CET 2025 (20 Apr, Shift 1)
Two monochromatic light beams have intensities in the ratio 1:9. An interference pattern…JEE Main 2025 (3 Apr, Shift 2)
Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The…JEE Main 2025 (3 Apr, Shift 1)
The two coherent sources produce interference with intensity ratio ' b '. In the…MHT CET 2025 (21 Apr, Shift 2)
In Young's double slit interference experiment, using two coherent sources of different…MHT CET 2025 (19 Apr, Shift 1)
Width of one of the two slits in a Young's double slit interference experiment is half of…JEE Main 2025 (3 Apr, Shift 2)
The width of one of the two slits in Young's double slit experiment is d while that of…JEE Main 2025 (23 Jan, Shift 2)

Superposition, Coherence & Intensity question from MHT CET 2025 (25 Apr, Shift 1)

More questions on Superposition, Coherence & Intensity