Question

2. An objeot is placed at 60 em from a concave lens of focal length
30 cm, find the image dintanac?
3M
​

Answer 1

Explanation:

1/f = 1/v - 1/u

-1/30 = 1/v - (-1/60)

-1/30 - 1/60 = 1/v

v = - 20 cm