Question

Calculate the position of the image if object is a distance a) 10 cm from a convex of focal length 20cm.​

Answer 1

answer:

v = −20cm

explanation:

Given:

u=−10cm

f=20cm (convex lens)

1/v −1/u = 1/f

1/v + 1/10= 20/1

1/v = −1/20

v = −20cm

And magnification = u/v

-10/20 =2

Hence image formed is virtual, erect and magnified two times.