Find the thickness of a plate that produces a change in optical path equal to half…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

Find the thickness of a plate that produces a change in optical path equal to half the wavelength

\lambda

of light passing normally through it. The refractive index of the plate is

\mu

. (a)

\frac{\lambda}{4(\mu-1)}

(b)

\frac{2\lambda}{\mu-1}

(c)

\frac{\lambda}{\mu-1}

(d)

\frac{\lambda}{2(\mu-1)}