Focal length of a converging lens is 9.7 cm. A candle is placed 29cm from the le

Question

Focal length of a converging lens is 9.7 cm. A candle is placed 29cm from the lens. What is the distance between the image of the lenths in cm

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Explanation / Answer

f = focal length = 9.7 cm

do = object distance = 29 cm

di = image distance = ?

Using the lens equation

1/di + 1/do = 1/f

1/di + 1/29 = 1/9.7

di = 14.6 cm

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