Suppose an object has thickness

PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

du

, so that it extends from object distance

u

u+du

. Prove that the thickness

dv

of its image is

\left(-\frac{v^2}{u^2}\right)du

. Hence show that the longitudinal magnification is

\frac{dv}{du}=-m^2

, where

m

is the lateral magnification.