Which of the following are true about sound wave

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Travels fastest in gases

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Laws of reflection is not valid

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Particles oscillate about their mean position

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Solution

The correct options are
A 1
D
Particles oscillate about their mean position

Sound is a mechanical longitudinal wave. It need a medium to propogate. Particles oscillate about their mean position parallel to direction of wave propogation.

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Which of the following are true about sound wave

The correct options are A 1 D Particles oscillate about their mean position Sound is a mechanical longitudinal wave. It need a medium to propogate. Particles oscillate about their mean position parallel to direction of wave propogation.

The correct options are
A 1
D
Particles oscillate about their mean position

Sound is a mechanical longitudinal wave. It need a medium to propogate. Particles oscillate about their mean position parallel to direction of wave propogation.