Focal Length - MCAT Chemical and Physical Foundations of Biological Systems

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Question

A concave mirror has a radius of curvature of 0.85m. Where is the mirror's focal point?

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Answer

Since the mirror is concave, the focal point will be in front of the mirror. The focal length is equal to one half of the radius of curvature.

Rc is the radius of curvature. Plugging in 0.85m for Rc allows us to solve for the focal length.

0.43m is equal to 43cm.

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