22.  A small statue has a height of 3.5 cm and is placed in front of a concave mirror. The image of the statue is inverted, 1.5 cm tall, and located 13 cm in front of the mirror. Find the focal length of the mirror.

 

Using the magnification relation

We can find the object distance o

 

 

Now we can find the focal length from the mirror equation

 

 

 

 

 

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This page last updated on November 19, 2020