Question

the focal length of convex lens is 20 cm and an object is placed at 60 cm from the lens that find where the image formed​

Answer 1

Answer:

Image distance = 30 cm

Explanation:

f = 20 cm

u = - 60 cm   (sign convention)

1/v - 1/u = 1/f

1/v = 1/20 - 1/60

    = 1/30

v = 30 cm