what is refraction? explain the changes that are seen in the light in the following : I)first when light travels from a denser to rarer medium ii)when light travels from a rare to dense medium. please give me answer fast please it is so urgent
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when a ray of light travels from one transparent medium into another obliquely. the path of the light undergose deviation . this deviation of ray of light is called refraction
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thanks but I want whole anwer in long and there is two questions
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