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In Young's double-slit experiment, two w...

In Young's double-slit experiment, two wavelengths of light are used simultaneously where `lambda_(2) = 2 lambda_(1)`. In the fringe pattern observed on the screen,

A

maxima of wavelength `lambda_(2)` can coincide with minima of wavelength `lambda_(1)`

B

fringe width of `lambda_(2)` will be double that of fringe width of `lambda_(1)` and nth order maxima of `lambda_(2)` will coincide with 2nd order maxima of `lambda_(1)`

C

nth order minima of `lambda_(2)` will coincide with 2th order minima of `lambda_(1)`

D

none of above

Text Solution

Verified by Experts

The correct Answer is:
b.,c
`beta_(2) = (lambda_(2) D)/(d) = 2 (lambda_(1))/(d) D`
as `beta_(1) = (lambda_(1))/(d) D`
nth order maxima of `lambda_(2)` coincides with 2th order maxima of `lambda_(1)`. `n^(th)` order minima of `lambda_(2)` does not coincide with 2th order maxima of `lambda_(1)`.
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