Which is TRUE about total internal reflection?
AHappens when light goes from less-dense to denser medium.
BHappens when angle of incidence exceeds critical angle from a denser to less-dense medium.
COccurs at any angle from denser to less-dense.
DRequires two lenses.
Explanation
📌 TIR requires: (1) going from higher n to lower n; (2) angle of incidence exceeds the critical angle. Distractor A: reversed direction; C: not any angle; D: no lenses needed.