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April 18, 2014

April 18, 2014

Posted by **Barbie** on Monday, March 19, 2012 at 6:09am.

- theoretical optics -
**drwls**, Monday, March 19, 2012 at 6:36amThe focal length of the mirror is R/2 = 15 cm.

You must by now be familiar with the equation

1/do + 1/di = 1/f

which in your case becomes

1/do + 1/20 = 1/15

Solve for do (the object distance). The magnification will be di/do.

Multiply that by 1.5 meters for the image size

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