Re: lenses
- From: Sam Wormley <swormley1@xxxxxxxxx>
- Date: Sat, 20 Aug 2005 19:43:52 GMT
Joe Drake wrote:
I recently read an article in a newspaper about someone who left a glass ball on a windowsill, the ball allegedly concentrated the rays of the sun, and started a fire.
http://www.aversion.com/news/news_article.cfm?news_id=4847
Is this possible? I was under the impression that a glass ball magnifies images, and causes the rays to diverge. But I am the first to admit that I am not an expert.
Someone who knows more about lenses than I do, please help.
Snell's Law applies http://scienceworld.wolfram.com/physics/SnellsLaw.html
Ray Diagrams for Lenses
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/raydiag.html Images involving Spherical Lenses
http://images.google.com/images?q=spherical+lens
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- From: Joe Drake
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