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 Dec 24th 2010, 09:48 PM #1 Junior Member   Join Date: Oct 2009 Posts: 5 ..prism ..Please...help... ...i think that the rays should go parallel after refraction and emerging out as they are coming in as parallel rays...but thats not given as a right answer...please help... Attached Thumbnails
Dec 25th 2010, 08:50 AM   #2
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 Originally Posted by anshulbshah ..Please...help... ...i think that the rays should go parallel after refraction and emerging out as they are coming in as parallel rays...but thats not given as a right answer...please help...
What makes you think this way? If it's a pure guess, try to confirm/discard mathematically.
What I'd do in this problem is to apply Snell's law. Are you familiar with it? Could you draw the normal of the opposite sides and the angles of incidence?
Find out the angles of refraction using Snell's law.
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