define refraction of light? what causes refraction of light?
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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 travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction.
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Step-by-step explanation:
refraction of light is the bending of light when medium changes.it is caused by the change in medium.so refractive index changes and also velocity changes
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