A lens can be used to start a fire by focusing an image of the sun onto
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A lens can be used to start a fire by focusing an image of the sun onto a piece of flammable material. All other things being equal, would a lens with a short focal length or a long focal length be better as a fire starter? Explain.
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All other things being equal a lens with a shorter focal length would be better as a fire starter co...View the full answer
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Related Book For 
College Physics A Strategic Approach
ISBN: 9780321907240
3rd Edition
Authors: Randall D. Knight, Brian Jones, Stuart Field
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