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December 19, 2014

Homework Help: grade 11 physics

Posted by Lora on Saturday, January 16, 2010 at 1:59pm.

Consider the optical interface between crown glass and ethanol. Under what conditions would total internal relfection be possible at this interface? ilustrate your answer with a light ray diagram.
Okay so you need the angle of incidenc to be greater than the critical angle AND the light must be travelling from a medium of higher index refraction into a medium of lower index of refraction.
Im just confused with the diagram part.
I have my axis drawn, with crown glass on top since its higher index of refraction, and then water below. But now I don't know how to draw the arrow.

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