Question

Consider three sound waves of frequencies as given below.
Sound 1: 50 Hz.
Sound 2: 100 Hz.
Sound 3: 200 Hz.
Which of the following statements is true regarding the speeds of these sounds through the same medium?

• A. Speed of sound 1 > Speed of sound 2 > Speed of sound 3
• B. Speed of sound 1 < Speed of sound 2 < Speed of sound 3
• C. Speed of sound 1 = Speed of sound 2 = Speed of sound 3
• D. Speed of sound 3 > Speed of sound 2 > Speed of sound 1

Answer 1

The correct option is C Speed of sound 1 = Speed of sound 2 = Speed of sound 3

The speed of sound in a medium is constant for a given medium. It is independent of the frequency of the wave. Frequency of the wave is defined only by the frequency of the vibration of the source of sound.

$\therefore$ Speed of sound 1 = Speed of sound 2 = Speed of sound 3