Q. 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
Explanation
(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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.