incident ray - the ray that approaches the boundary, refracted ray - the ray that has changed on entering the different medium, normal - an imaginary line drawn at 90º to the surface, angle of incidence - the angle from the normal to the incident ray, angle of refraction - the angle from the normal to the refracted ray, critical angle - the angle where the refracted ray is at 90º to the normal, total internal reflection - the process of reflecting light hitting the boundary of a more dense medium at greater than the critical angle, medium - the material through which the ray is travelling, ray - a narrow continuous beam of light, The angle of refraction - S, The angle of incidence - Q, fibre optics - a system that uses TIR for communication and the Internet,

leaving cert physics Refraction

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