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refraction

n.
1.the change in direction of a propagating wave (light or sound) when passing from one medium to another
2.the amount by which a propagating wave is bent

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Word of the Day

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    Idiom of the Day

    a slow-down
    a type of work action where you do not come to a complete stop like you do during a work strike
    The workers had a slow-down at the post office last year.



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