February 21, 2017

Homework Help: Physics

Posted by Susan on Wednesday, March 19, 2008 at 9:24pm.

A convex mirror has a focal length of
-18 cm. How far behind the mirror does the image of a person 3.0 m away appear? The answer must be in cm.

The equation to use woulde be:
1/f = 1/do + 1/di

do = 300 cm
f = would it be -18 cm or 18 cm???

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