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

Question

What is the effect on Fresnel's biprism experiment when the use of white light is made? (A) Fringe are affected (B) Diffraction pattern is spread more (C) Central fringe is white and all are coloured (D) None of these

Tardigrade Admin · Accepted Answer

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.

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

Fringe are affected

Diffraction pattern is spread more

Central fringe is white and all are coloured

None of these

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.