When will I get total reflection?

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Total reflection occurs when the angle of incidence exceeds the critical angle, leading to sin(theta) being greater than 1. The direction of a light ray does indeed change when it passes through a plan-parallel slab, and this change can be analyzed using Snell's Law. The discussion emphasizes the importance of understanding the critical angle to predict total reflection accurately. Applying Snell's Law allows for tracking the light ray's path through different media. Understanding these principles is crucial for mastering concepts related to optics and light behavior.
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Homework Statement




http://i.imgur.com/JElvT.png

JElvT.png



Homework Equations





The Attempt at a Solution



When will I get total reflection? sin(theta)>1?
 

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Does the direction of the light ray change when it traverses a plan-parallel slab?

ehild
 
It does,I guess...
 
And how much does it change? Can you follow the ray by applying Snell's Law?

ehild
 
Thank you!
 

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