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What is a non dispersive medium?...

What is a non dispersive medium?

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A medium in which speed of wave motion is independent of frequency of wave is called non-dispersive medium. For sound, air is not dispersive medium.
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CBSE COMPLEMENTARY MATERIAL-MECHANICAL WAVES-MCQ
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  16. Equation of progressive wav is given by y = 0.2cospi{(0.4 t +0.02x)-pi...

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