Saturday
April 19, 2014

Homework Help: physics

Posted by Jo on Tuesday, March 19, 2013 at 1:33pm.

A slide is 5 inches high. it is placed 5.5 inches from the convex lens of a porjection lantern. The image is cast upon a screen 55 inches away. the focal length of the lens is ______inches?
b) the heigh of the image cast by the lens is ________inches?

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