Tuesday, February 21, 2006

Divers with Flashlights

Refraction and Snell's Law

A diver shines a flashlight upwards from beneath the water at a 42.5 degree angle to the vertical. At what angle does the beam of light leave the water?

Snell’s law:

    sin(?r)/sin(?i)=ni/nr

    sin(?r)=nwater sin(?i)

    ?r=1.3 sin(?i)

    ?r=61.4o

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