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A Young's double slit experiment is perf...

A Young's double slit experiment is performed with white light, then

A

the fringe next to the central will be red

B

the central fringe will be white

C

the fringe next to the central will be violet

D

there will not be a completely dark fringe

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
`lambda_v` is least. Therefore `omega_v` is minimum (as `omega prop lambda`).
Hence, the fringe next to centre will be violet.
At centre, `Deltax = 0 ` for all wavelengths. Hence, all
wavelengths interfere constructively at centre. So, it is white.
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Knowledge Check

  • If the Young’s double slit experiment is performed with white light, then which of the following is not true

    A
    the central maximum will be white
    B
    there will not be a completely dark fringe
    C
    the fringe next to the central will be red
    D
    the fringe next to the central will be violet

  • In Young's double slit experiment

    A
    only interference occurs
    B
    only diffraction occurs
    C
    both interference and diffraction occurs
    D
    polarisation occurs

  • In Young's double slit experiment:

    A
    The interference pattern has a number of equally spaced bright and dark bands
    B
    The interference pattern has a central bright maximum which is twice as wide as other maximum
    C
    Intensity of all bright bands is same
    D
    Both (1) & (3)