Question

The magnification by a lens is +0.5. Name the lens
and state how are u and v related ?​

Answer 1

CONVEX LENS

It is a convex lens as:

m=1/f

So if magnification is positive, f should also be positive. Focal length of a convex lens is positive (right side of the lens).

Therefore, it is a convex lens.

RELATION OF U AND V:

1/f= 1/v - 1/u (IN LENS)

1/f= 1/v + 1/u (IN MIRROR)

Answer 2

Answer:

the image is formed by convex lens

v=-3u