Magnifying Glass
Posted in Watches on 04/07/2009 12:58 pm by adminHow close can a magnifying glass be to a piece of paper before it stops working?
Does it depend on the magnifying glass? Is there some sort of formula to work it out?
There is no limit on how close.... the glass never stops working. The issue is the focal length of the magnifying glass lens. That determines the distance from the glass to the paper to focus the sun into the smallest image possible.... which is how you burn ants and paper. Have fun!
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