Refraction through a semicircular block
Lesson 19 / 27
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Lesson outcome
I can describe and explain when refraction happens and when total internal reflection happens at boundaries between media.
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At a boundary to a medium where the wave speed increases, waves are refracted away from the normal.
If the angle of incidence is too big the waves will undergo total internal reflection.
For a glass–air boundary, the total internal reflection occurs when the angle of incidence is 42° or greater.
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