Lesson: Chapter 5 — Optics

5.3.2. Total internal reflection and the critical angle 2 of 5 Reset answers

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Question 2

Which two conditions are needed for total internal reflection?

A Denser to rarer, angle greater than critical B Denser to rarer, angle less than critical C Rarer to denser, angle less than critical D Any two media, any angle

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Denser to rarer, angle greater than critical. Below the critical angle the ray still refracts out.

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