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In a biprism experimentn is performed ye...

In a biprism experimentn is performed yellow light of wavelength `5600Å`. The yellow light was then replaced by red light of wavelengts `6400Å`. Find the value of n for which `(n+1)^(th)` yellow bright band consider with the `n^(th)` red bright band for the same setting.

A

4

B

5

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
D
`x_((n+1))` for yellow `=x_(n)` for red
`rArr (D)/(d) (n+1)lambda_(y)= (D)/(d) n lambda_(r)`
`:. N= (lambda_(y))/(lambda_(r)- lambda_(y))`
`=(5600)/(64000-5600)=7`
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