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April 1, 2015

April 1, 2015

Posted by **Emily** on Thursday, May 27, 2010 at 12:19am.

(USe the thin lens equation)

For this question, how would you know whether the image is virtual or real?(in order to know if the distance to the mirror is negative or positive)

- Physics -
**drwls**, Thursday, May 27, 2010 at 7:03amSolve

1/do + 1/di = 1/do + 1/14 = 1/f = 1/7

The answer is that the object distance is (do) = 14. You get a 1:1 real image.

The image is real because do is positive.

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