Two thin lenses are arranged coaxially apart

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

Problem

Two thin lenses are arranged coaxially

5\,\text{cm}

apart. L

_1

is a convex lens of focal length

10\,\text{cm}

and L

_2

is a concave lens of focal length

20\,\text{cm}

. An object is placed

15\,\text{cm}

in front of L

_1

. What is the overall magnification produced by the combination? (a)

+0.125

(b)

+8

(c)

+4

(d)

-8