Question

A student using convex lens of focal length 20cm, formed image of an object placed infront of the lens on one side a screen placed on the other side of the lens.He noted the following reading for object distance and image distance from lens. ​

Answer 1

Given:

focal length =20cm

The following observations are noted wrong :

case III:

object position =u=40cm

When object is plaed on C we should get image position on C only

V=40cm

Case 5:

Object position=u=35cm

When object is placed between F and C we get image beyond C. so image position should be greater than 40cm.

Case 6:When object position is between P and F we get Image on the same side of lens,so V should be negative.

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Answer 2

Answer:

pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi