Math, asked by poshakkhetan05, 10 days ago

The image formed at 45cm, when object placed at 15cm away from concave lens. find its focal length.

Answers

Answered by jagan1505

1

1/v - 1/u = 1/f

1/45 - 1/15 = (1 - 3)/45 = -2 /45 = 1/f

f = -22.5 cm

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