Question

if the focal length of a concave lens is 50cm,object is placed 75cm from the lens ,then find the image distance and magnification produced by the lens
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Answer 1

Answer:

f=50(-ve)

u=75(-ve)

1/v-1/u=1/f

i/v=1/f+1/u

i/v=-1/50-1/75

1/v=1/-15

v=15(-ve)

m=v/u

m=15/75

m=1/5