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What caused light to appear bent when it refracts ?

What caused light to appear bent when it refracts ?-example-1
User MechanisM
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2 Answers

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22 votes
Answer: I think C. When light enters a different medium, it travels at a different speed.

Explanation: sorry if I’m wrong!
User Figbar
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19 votes

Answer:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.

User Ali Akdurak
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