Question

An object is placed 15 cm away from a convex mirror of focal length 45 cm
.Calculate the position of image and its magnification.

Answer 1

Answer:

Object distance(u) =-15cm

Focal length (f)= 45cm

1/v+1/u=1/f

1/v=1/f-1/u

1/v=1/45-(-1/15)

1/v=1/45+1/15

1/v=1/45+3/45

1/v=4/45

1/v=1/11.25

v=11.25cm

Magnification (m)=-v/u

=-11.25/15