Question

Q4: An object of size 4 cm is placed at 20 cm away from the concave mirror of radius of curvature 60 cm find position and size of the image.​

Answer 1

Radius of curvature of the mirror, R = -60 cm

Focal length of the mirror, f = -30 cm

Object distance, u = -20 cm

Let v is the position of the mirror.

1/v + 1/u = 1/f

1/v = 1/f - 1/u

1/v = 1/-30 - 1/-20

1/v = 60cm