Question

Write relation between magnification of image and focal length.​

Answer 1

Answer:

Explanation:

What is the relationship between magnification and focal length?

For a magnification of one, 1.0, - the image size being the same as the object size - the lens has to be moved forward to twice the focal length. So a 50mm lens has to be cranked out to 100mm of lens to image distance. At 200mm focal length the distance is 400mm

Answer 2

Explanation:

M=-v/u which can be written as,

M=f/f-u or M=f-v/f