what is force explain with an example
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A push or pull of an object ...
eg...Taking book from table
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ye log esa hi krte hai sukun se jine hi ni dete XD lol
Explanation:
In optics, the refractive index of a material is a dimensionless number that describes how fast light travels through the material. It is defined as n={\frac {c}{v}}, where c is the speed of light in vacuum and v is the phase velocity of light in the medium
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