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September 4, 2015

Homework Help: physics

Posted by Anonymous on Wednesday, April 21, 2010 at 5:12pm.

if you fire a ball through a pile of sand, it iwll slow ddown in the sand and emerge at less that its initial speed. But when light shines pn a pane of glass, even though it slows down inside, its speed upon emerging is the same as its initial speed. Explain

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