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Total Internal Reflection
AP Physics 2 · Unit 13 Geometric Optics
Learning Objectives
Critical angle: θc = arcsin(n₂/n₁)
TIR occurs when θ > θc and n₁ > n₂
Apply Snell's law: n₁sinθ₁ = n₂sinθ₂
Fiber optics use TIR for signal transmission
Tags
TIR
critical angle
Snell's law
fiber optics
AP Physics 2
Angle of Incidence (°)
30
n₁ (dense)
1.50
n₂ (less dense)
1.00
Results
θ_critical
—
θ_refracted
—
Status
—
n₁/n₂
—