In YDSE, when a glass plate of refractive index and thickness is placed in the path…

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

Problem

In YDSE, when a glass plate of refractive index

1.5

and thickness

t

is placed in the path of one interfering beam of wavelength

\lambda

, the intensity at the position where the central maximum previously occurred remains unchanged. The minimum thickness of the glass plate is (1)

2\lambda

(2)

\frac{2\lambda}{3}

(3)

\frac{\lambda}{3}

(4)

\lambda