Question

An object 3 cm size is placed 20 cm in front of a concave
mirror of focal length 15 cm. At what distance from the mirror
should a screen be placed in order to obtain a sharp image
Find the nature and size of image formed ?
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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

h1=3cm u=-20 and f= - 15

by mirror formula

1/v+1/u =1/f

the answer will be

v = - 60

h2 = - 9 cm