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Two sources of light P and Q have wavele...

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

7

C

9

D

11

Text Solution

Verified by Experts

The correct Answer is:
D
`nlamda_(1)=(n+1)lamda_(2)`
`therefore nxx6000=(n+1)5500`
`12n=(n+1)11=11n+1I`
`therefore n=1I`
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