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When YDSE is conducted with white light,...

When YDSE is conducted with white light, a white fringe is observed at the centre of the screen. When the screen is moved towards the slits by 5mm, then this white fringe

A

does not move

B

becomes red

C

disappears

D

Nothing can be said

Text Solution

Verified by Experts

The correct Answer is:
A
Path difference at centre is always zero. Hence, all
wavelengths under all conditions always interfere
constructively.
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