Homework Help: physics

Posted by Cynthia on Wednesday, June 17, 2009 at 4:46pm.

just a few quick communication questions...
1-is it possible to have total internal reflection for light incident from air onto water? why?

2-what is the angle of refraction when a light ray meets the boundary between two materials perpendicularly?

physics - bobpursley, Wednesday, June 17, 2009 at 5:45pm
1. No. The refracted angle would be 90 deg, so

Nair*sinThetaincid=Nwater(sin90_
sinthetaincid=1.333

In Texas, sines dont go that high.

2. Perpendicular goes straight thru, no bending.

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