Question

If two sources emit light waves of different amplitudes then in interference pattern

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

Hint:

In interference patterns with unequal amplitudes, the light intensity at points of destructive interference will not be zero but will instead depend on the difference in amplitudes of the two waves.

Answer 1

The Correct Option is C

Step 1: Understanding interference pattern.
In interference, when two light waves with different amplitudes interfere, the result is not complete destructive interference. Instead, there is some residual intensity even in the region where the waves would normally cancel each other out if they had the same amplitude. This occurs because the waves do not cancel completely due to their different amplitudes.
Step 2: Conclusion.
Thus, the correct answer is (C) there is some intensity of light in the region of destructive interference.