I have a query about refraction of light. I know that when light travels from medium to another it bends at the surface of separation between the two media.So as light travels in a straight line and at a constant speed in vacuum at 299,792,458 m/s and so we can say that it has velocity.During refraction , it changes its original direction and its speed also changes and so can we say that it has accelerated? If yes, then what force is acting on it ?

Please tell me about this cause I'm very curious to know it and please can someone post some helpful links regarding this topic.All answers will be dearly appreciated.

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TopNewestlight can be both waves and particles. as light is bent, it is true that a force acts on it

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