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What is the effect on Fresnel's biprism ...

What is the effect on Fresnel's biprism experiment when the use of white light is made?

A

(a) Fringe are affected

B

(b) Diffraction pattern is spread more

C

(c) Central fringe is white and all are coloured

D

(d) None of these

Text Solution

Verified by Experts

The correct Answer is:
C
With white light, the rays reaching the centre has zero path difference. So we get white fringe at the centre and coloured near the central fringe.
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Knowledge Check

  • In Fresnel's biprims experiment, the two sources of light are

    A
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    two real imatges of slite
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  • If white light is used in a biprism experiment, then

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    B
    all fringes will be coloured
    C
    central fringe will be white others will be coloured
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