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Reflection & Refraction

Trace light rays through different media
Data
Incident Angle (i)45.0°
Refraction Angle (r)28.1°

Parameters

Incident Angle (i)45°
Index n₁ (Top)1.00
Index n₂ (Bottom)1.50

Snell's Law

Total Internal Reflection

  • Light travels from a denser to a less dense medium (n₁ > n₂)
  • The angle of incidence is greater than the critical angle (i > c)
Critical angle
TIR cannot occur when n₁ ≤ n₂ (light enters a denser medium).