Refractive index and total internal reflection 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: chloefaunCreated on: 17-04-14 16:18 What is refraction? It is when waves change direction as they enter a different medium 1 of 6 Why does the light change direction? Because when the density of the mediums used change, the waves slow down as a result of the denser material 2 of 6 Why do optical fibres work? As a result of total internal reflection 3 of 6 Total internal reflection can only happen when? When a wave travels through a dense substance towards a less dense substance 4 of 6 Finish the sentence :A dense material with a high refractive index... ...has a low critical angle 5 of 6 The value of the critical angle depends on... ...the refractive index 6 of 6
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