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Two sources of light P and Q have wavelengths 6000 Å and 5500 Å respectively. In a biprism experiment, first the source P is used, and then it is replaced by the source Q. it is found that the position of the `n^(th)` bright band corresponding to P is occupied by `(n+1)^(th)` bright band of Q. what is the value of n?

A

5

B

6

C

10

D

11

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda_(1)= 6000Å, lambda_(2) 5500Å, n=?`
`n=(lambda_(2))/(lambda_(1)-lambda_(2))` Provided `lambda_(1) gt lambda_(2)`
` n=(5500)/(6000-5500)=11`
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