First slide

Coherent sources and their importance in interference

Question

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

Easy

A

Fringe are affected
B

Diffraction pattern is spread more
C

Central fringe is white and all are coloured
D

None of these

Solution

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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