A) Young's double slit arrangement produces virtual coherent sources whereas Fresnel biprism produces real coherent sources
B) Young's double slit arrangement produces coherent point sources whereas Fresnel biprism produces coherent sources which are not point sources
C) Both Young's double slit arrangement and Fresnel biprism produce similar coherent sources
D) Fresnel birism produces virtual coherent point sources whereas Young's double slit arrangement produces real coherent sources which are not point sources.
Correct Answer: D
Solution :
| Option [d] is correct |
| Explanation: In Young's double Slits experiment, a single source is split in two coherent sources. Both are real. Both the slits have finite width. Fresnel biprism divides the beam of monochromatic light incident on it into two components. One of these component is refracted from upper portion of biprism and the other one refracted through lower portion. |
| Thus two virtual coherent sources are formed from the original source. |
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