Physics, asked by rajsiroha2gmailcom, 9 months ago

The image of a pin kept at a distance of 20cm from a concave mirror is formed 40cm away from the mirror. Find the focal length?

Answers

Answered by cutegirl434

1

Answer:

f=4cm

1/v-1/u=1/f . 20/80=1/f. f=4cm

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