Question

A 2 times enlarged image is formed using a spherical lens of focal length 40cm. find object and image distance. plz it answer fast.. thanks ​

Answer 1

Answer:

Explanation:

Given,

v/u=2

Or,v=2u

Now,

1/f=1/v+1/u

Or,1/40=1/2u+1/u

Or,3/2u=1/40

therefore,u=60

So,v=2×60=120cm