Posted by **Fleur** on Thursday, October 25, 2012 at 3:30pm.

What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm?

0.33

-0.33

1.33

-1.33

I'm thinking B.

- Physics -
**Elena**, Thursday, October 25, 2012 at 3:52pm
-0.33

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