Question

1. An object is placed at a distance 80 cm from a convex lens of focal length 20 cm. Find the position of the image and state nature of the image.​

Answer 1

Answer:

Explanation:

Using lens formula  ,

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

 ⇒v=60cm

distance of this Image form mirror is 20cm. As per given condition Image should form at COC of mirror.

So that 20cm=2f  

⇒f ​=10cm.

hence maximum distance for virtual image is focal length =10cm.