Question Detail
Question
Total internal reflection cannot occur when light travels from
Correct Answer
Option D is the correct answer.
Detailed Explanation
Total internal reflection occurs when light travels from a denser medium to a rarer medium. Air to vacuum is from a rarer to a rarer (or even denser) medium? Actually, vacuum is less dense than air, so light traveling from air to vacuum would not undergo total internal reflection because it's going from rarer to rarer.
Hint
Total internal reflection requires travel from denser to rarer.