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}} $
