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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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Knowledge Check

  • In a two slit experiment with white light, a white fringe is observed o a screen kept behind the slits When the screen in moved away by 0.05 m, this white fringe

    A
    does not move at all
    B
    gets displaced from its earlier position
    C
    become colored
    D
    disappears

  • The way the fringe pattern changes when the screen is moved away from the slits is

    A
    width of frings increases
    B
    width of fringe decreases
    C
    no changes observed
    D
    change will vary

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    A
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    B
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