Optics Question 1108

Question: In Young’s double slit experiment using sodium light (l=5898AA) , 92 fringes are seen. If given colour (l=5461AA) is used, how many fringes will be seen

[CPMT 1989; RPET 1996; JIPMER 2001, 02]

Options:

A) 62

B) 67

C) 85

D) 99

Show Answer

Answer:

Correct Answer: D

Solution:

(n1λ1=n2λ2)

n1n2=λ2λ1n192=58985461n1=99



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