Question

Focal length of convex lens 15cm when a object kept a distance of 25cm and mangnication produced

Answer 1

Answer:

1/f=1/v-1/u

where,

f=15cm

u=-25cm

1/15 +1/25=1/v

1/v=5+3/75

1/v=8/75

v=75/8 cm.

magnification=v/u

=75/(8*-25)

=-75/200

=-3/8

= -0.375

hope this will help u