Mission RL5 Total Internal Reflection (TIR)
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Total internal reflection can most accurately be described as ____.

Definition of Total Internal Reflection:
Total internal reflection (TIR) is the phenomenon that occurs when all the light which is approaching a boundary with a transparent medium undergoes reflection and remains within the original medium.
Total internal reflection (TIR) is the phenomenon that occurs when all the light which is approaching a boundary with a transparent medium undergoes reflection and remains within the original medium.