Question

The focal length of a convex lens is 50 cm.
of an object is kept at a distance of 75 cm
from the lens , then find the image
distance & magnification produced by the lens​

Answer 1

HEY MATE HERE IS YOUR 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)

= 0.4

ANSWER- 0.4

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