Refractive index 0.0 / 5 ? PhysicsLight and OpticsGCSEAQA Created by: CharCreated on: 20-05-13 17:03 What is refraction? The change of direction of light as it passes from one transparent substance into another? 1 of 11 Why does refraction take place? Because the waves change speed when they cross a boundary 2 of 11 What causes a change in direction? The change of speed of the waves 3 of 11 UNLESS, they are travelling along? The normal 4 of 11 What way will a light ray refract when it crosses from air to glass? Towards the normal 5 of 11 So which way will it refract from glass to air? Away from the normal 6 of 11 What is the measure of how much the substance can refract a light ray? The refractive index of a substance 7 of 11 What equation is the refractive index? n=sin I/ sin R 8 of 11 What stands for the refractive index of the substance? n 9 of 11 What is sin I? The sine of the angle of incidence 10 of 11 What is sin R? The sine of angle of refraction 11 of 11
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