Question

what is the magnification of lens having 20 cm focal length, object distance 60 cm and image formed at 30 cm?​

Answer 1

Answer:1/2or0.5

Explanation:formula for magnification is

M=> -v/u

here

V=>image distance which is positive

U=>object distance which is negative

By using the conditions

M=> -(60/-30)

=>-(-1/2)or-(-0.5)

=>1/2 or 0.5