A thin convergent glass lens has a power of

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

Problem

A thin convergent glass lens

(\mu_g=1.5)

has a power of

+5.0\,\mathrm{D}

. When this lens is immersed in a liquid of refractive index

\mu_l

, it acts as a divergent lens of focal length

100\,\mathrm{cm}

. The value of

\mu_l

is (1)

\frac{4}{3}

(2)

\frac{5}{3}

(3)

\frac{5}{4}

(4)

\frac{6}{5}