Question

Through which of the following mediums sound CANNOT travel?
1. Vaccum
2. Milk
3. Air
4. Steel

Answer 1

Correct Answer - Option 1 : Vaccum

The correct answer is Vaccum​.

• Sound is a longitudinal wave that consists of compressions and rarefactions traveling through a medium.
• Sound cannot travel through Vaccum.
• As sound waves are longitudinal waves, the air particles vibrate to and fro in the direction of the propagation of sound.
• The study of sound is called Acoustics.
• Speed of sound in air = 343 m/s.
• Unit of the frequency of sound: Hertz(Hz).
• Unit of Intensity of sound: Decibels(dB).
• The sound frequency at which a human can hear ranges between 20Hz to 20kHz.