In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm . What should be the wavelength of the
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm . What should be the wavelength of the light source in order to obtain 5th bright fringe at the same point
A. 500 m
B. 630 nm
C. 750 nm
D. 420 nm
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Correct Answer - D
`n_(1) lambda_(1)=n_(2)lambda_(2)`
`implies 3 xx 700=5 xx lambda_(2)`
`implies lambda_(2)=420 nm`
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