Optics Question 1153

Question: If Fresnel’s biprism experiment as held in water inspite of air, then what will be the effect on fringe width

[RPMT 1997, 98]

Options:

A) Decrease

B) Increase

C) No effect

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

$ \because $

$ \beta \propto \lambda \Rightarrow {\lambda _{w}}<{\lambda _{a}} $ so $ {\beta _{w}}<{\beta _{a}} $



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