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In Young's experiment the wavelength of ...

In Young's experiment the wavelength of red light is `7.5xx10^(-5)`cm.and that of blue light `5.0xx10^(-5)`.The value of n for which `(n+1)^(th)`the blue bright band coincides with`n^(th)`red band is -

A

`8`

B

`4`

C

`2`

D

`1`

Text Solution

Verified by Experts

`n_(1)lambda_(1)=n_(2)lambda_(2)` for bright fringe
`n(7.5xx10^(-5))=(n+1)(5xx10^(-5)) n=(5.0xx10^(-5))/(2.5xxx10^(-5)`=2
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