Question Detail
Question
The critical angle (θC) for total internal reflection is defined as the angle of incidence for which the angle of refraction will be:
Correct Answer
Option C is the correct answer.
Detailed Explanation
Page 47 states: 'There is an angle of incidence for which the angle of refraction will be 90°; this is called the critical angle'.
Hint
When the angle of refraction reaches its maximum possible value, total internal reflection becomes possible.