changed in some way from the original to become less clear - distorted, light changing direction on crossing a boundary from one medium to another due to a change in speed of the lightto become less clear - refraction, in this topic, the transparent material through which light is passing - medium, changed direction; in refraction, at boundaries, this is a sudden change - bent, the angle between the light ray and the normal becomes smaller after refraction - towards the normal, the angle between the light ray and the normal becomes larger after refraction - away from the normal, the angle between the light ray that has been refracted and the normal - angle of refraction, specially shaped pieces of transparent material designed to refract light in particular directions - lenses,

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