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 5$^{th}$ bright fringe at the same point?

Question

Dr. Abubacker · Accepted Answer

(d) $n_{1}\ \lambda_{1} = n_{2}\ \lambda_{2}$
$\Rightarrow 3 	imes 700 = 5 	imes \lambda_{2}$
$\Rightarrow \ \lambda_{2} = 420\ nm$

Q. 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 5$^{th}$ bright fringe at the same point?

Explanation

Reviewed by Dr. Abubacker

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