Question

When an object is placed at a distance of 50cm from a concave spherical mirror ,the magnification produced is -1/2 .where should the object be placed to get a magnification -1/5

Answer 1

Answer:

u = -50

m = -1/2

m = h'/h = -v/u

-1/2 = -v / -50

-1/2 = v / 50

v = -25

if magnification has to be -1/5,

then , m = -v/u

-1/5 = -25/ u

-u = -125

u = 125