Question

the focal length of a convex lens is 50cm if an object is kept at is distance of 75cm the lens then find the image distance and magnification produced by the lens
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Answer 1

Answer:Focal length (f) = 50cm

Object distance (u) = 75cm

Assumption: Let the image distance be v.

Le the magnification be m.

We know,

1/f = 1/u + 1/v

=> 1/50 = 1/(-75) + 1/v

=> 1/50 = - 1/75 + 1/v

=> 1/50 + 1/75 = 1/v

=> (3 + 2)/150 = 1/v

=> 5/150 = 1/v

=> 1/30 = 1/v

=> 30 = v

So,the image is formed at distance of 30cm.

Magnification = - v/u

= - 30/(-75)

Answer 2

Answer:so the answer is 25cm may be I'm wrong and new for brainly it may be wrong

Explanation:how did it become -75 cm convex means +. And concave means -.