Question

An Object is placed at a distance of 50cm from a concave lens of focal length 20 cm. Find the nature and position of the image .
PLEASE ANSWER


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Answer 1

Answer:

Explanation:

here, f=-20(focal length in concave lens is always negative) and u=-50(object distance in concave lens is always negative)

1/f=1/v+1/u(mirror formula)

-1/20=1/v-1/50

-1/20=50-v/50v

-50v=-1000+20v

-30v=-1000

v=33.3cm

nature-virtual and magnified

position-behind the mirror