Question

An object is kept at certain distance on the principal axis of convex lens of foacl length 30 cm it image is formed at a distance of 20 cm find the object distance and type of image formed by the lens

Answer 1

Answer:

Explanation:

u=−30cm

f=15cm

solution:from mirror equation

v1​+u1​=f1​

v1​−301​=151​

v1​=303​

v=10cm