Identify the correct statement from among the following:
A.The lower the frequency of the vibration, higher is the pitch.
B.The loudness of sound is determined by the frequency of vibration.
C.Sound cannot travel through vacuum.✓ Correct
D.Pitch of sound is determined by its amplitude.
Explanation
Sound requires a material medium (solid, liquid or gas) to propagate because it travels as mechanical longitudinal waves involving vibrations of particles. In a vacuum there are no particles to vibrate, so sound cannot travel. The other options are incorrect: higher frequency gives higher pitch (not lower); loudness is determined by amplitude (not frequency); and pitch is determined by frequency (not amplitude).
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