A convex lens with a focal length of 10 cm is located 30 cm away from a
candle. How far from the lens is the image located on the other side, to the
nearest cm? Record your answer to the nearest whole number. *

15 cm

Explanation:

According to the Lens Equation we have the following:

(1)

Where:

is the focal length

is the distance between the candle (the object) and the lens

is the distance between the image and the lens

Isolating :

(2)

Solving:

(3)

Finally:

This is where the image is located

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