← Physics (0625)
Q1 / 5
Light
Higher
2 marks
What is total internal reflection (TIR) and state the two conditions required?
A
Complete reflection at boundary (no refraction); conditions: denser to less dense medium AND angle > critical angle
B
Reflection of light off any surface at any angle
C
Light trapped inside a vacuum — no conditions needed
D
Occurs only when light hits a mirror at 90°
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