Why does a ray of light bend when it travels from one medium into another?

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4 Answers

When a ray of light travels from one medium to another, its speed changes and this change in speed of light causes the bending of light (refraction of light).

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Due to change in velocity in the medium and to reduce the time taken to travel the same.

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Due to changes in velocity of light in the medium and to reduce the time to travel the same.

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Due to change in velocity in the medium and to reduce the time taken to travel the same, a ray of light bends when it travels from one medium to another.

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