Multiple choice

The sound carried by air from sitar to the listener is by way of a

  1. longitudinal stationary wave

  2. transverse progressive wave

  3. transverse stationary wave

  4. longitudinal progressive wave
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sound waves in air are longitudinal because the particles of the medium vibrate parallel to the direction of wave propagation. They are progressive because they transfer energy from the source (the sitar) to the listener. Stationary waves, by contrast, do not transfer energy across the medium.

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