In YDSE, bichromatic light of wavelengths and is used. The maxima due to both lights…

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

In YDSE, bichromatic light of wavelengths

\lambda_1

and

\lambda_2

is used. The maxima due to both lights overlap at a distance

y

from the central maximum. If the slit separation is

d

and the screen distance is

D

, then

y

is (1)

\left(\frac{\lambda_1+\lambda_2}{2D}\right)d

(2)

\left(\frac{\lambda_1-\lambda_2}{D}\right)2d

(3)

\operatorname{LCM}\left(\frac{\lambda_1D}{d},\frac{\lambda_2D}{d}\right)

(4)

\operatorname{HCF}\left(\frac{\lambda_1D}{d},\frac{\lambda_2D}{d}\right)