Homework Help: physics ---- really dnt get this at all

Posted by ashley -- on Saturday, April 30, 2011 at 6:24pm.

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance?
Choose one answer.
a. -21.4 cm
b. 21.4 cm
c. 65 cm
d. 35 cm

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