Question

The magnification of a magnifying lens of focal length 5 cm is :(final image is at infinity)
a) 1
b) 2
c) 3
d) 5

Answer 1

wat si the type of lens that magnifies ur imge and also produces a virtual image?
answer this question
then wat is the ray diagram for getting image at infinity with that type of lens?
wat is lens formula relating f,u,v
i can get my v from that?
wat is magnification? in terms of u and v
u are near the answer once u have ansered all these questions

Answer 2

The lens must be a convex lens. The object is at focus.

Answer 3

\[1/v - 1/u = 1/f\]

Answer 4

Here, v = 0

Answer 5

Also, m = v/u

Answer 6

But, I am not getting the answer.

Answer 7

put down the ray diagram for me when image is at infinity for convex lens

Answer 8

Just one minute. Here is the diagram.