What Causes Light to Refract?

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Light has the highest speed of anything known.

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The speed of light in vacuum is about 300000 km/sec.

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Speed of light in air is 299910km/sec . It is 90 km slower than the speed of light in vaccum per sec.

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Refraction of Light Causes: When light travels from one medium to another, its speed changes, this change in speed of light causes refraction

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Explanation : The speed of light in glass is 200000 km/sec, which is less than light in air.

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So refraction (or bending) of light occurs at the boundary between the two media.

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The greater the difference between the speeds of light in two media, the greater is the bending of light.

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