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AP® Physics 1 & 2

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Solve for Focal Length Using Magnification

APPH12-K4L3XO

An object is placed 100 cm in front of a concave mirror, and a real image is formed that is 1/4 as tall as the object.

What is the focal length of this mirror?

A

20 cm

B

25 cm

C

33 cm

D

400 cm