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When a short timed wave is forced to reflect form a rigid wall then

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Rarefactions become compressions

It follows the law of reflections similar to that of light

Both of the above

None of the above

answer is C.

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Detailed Solution

When a short timed wave is forced to reflect form a rigid wall then rarefactions become compressions and It follows the law of reflections similar to that of light.
Reflection of sound follows the same rules as that of lights, e.g.,

angle of incidence = angle of reflection

. When a short termed wave called pulse is allowed to reflect from a wall, there is a phase difference of

Π (Pie)

in the waves. So compression becomes rarefaction and vice versa.

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