Question

find the position of the image when object is placed at a distance of 30 cm in front of convex lens having focal length 20cm​

Answer 1

Explanation:

Here is your answer Hope it helps you

Answer 2

Answer:

1/v - 1/u = 1/f

v = image distance

u = object distance

f = focal length

1/v - 1/30cm = 1/20cm

1/v = 1/20 + 1/30

= 3 + 2 / 60

= 5/60

= 1/12 = 12cm

hope it helps you.......