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How to derive the formula : d = t sin θ [ 1 - (n cosθ / n' cosθ)]

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    Hey guys!

    Could someone please tell me how to derive this formula by using Wave Phenomenon

    d = t sin θ [ 1 - (n cosθ / n' cosθ)]
    I think some of it is derived using Brewster's Principle and the Refractive Index but I cannot tell how?

    Thanks.
 
 
 
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