Total Internal Reflection Video Lessons

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Problem: Consider a beam of light traveling from a medium with a low index of refraction n1 to a new medium with a higher index of refraction n2. Use Snell’s Law to explain why total internal reflection will never occur in this situation, regardless of the choice of incident angle.

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Snell's law:

η1 sin θ1 = η2 sin θ2

θ1 is the angle of incidence. 

θ2 is the angle of refraction.

θc is the critical angle.

At θ1 = θc, θ2 = 90°

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Problem Details

Consider a beam of light traveling from a medium with a low index of refraction n1 to a new medium with a higher index of refraction n2

Use Snell’s Law to explain why total internal reflection will never occur in this situation, regardless of the choice of incident angle.

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