Question

Vibrating bodies produce __________.
A) light
B) sound
C) heat
D) all of the above

Answer 1

The to and fro motion or the back and forth motion of a body is referred to as vibration of the body. In some instances, these vibrations can be seen by our naked eyes and in other instances, the vibrations are felt or heard. The vibrations of a body produce a form of energy that can be heard sometimes.

Complete step by step answer.
Step 1: Try to explain the production of sound by vibrating bodies.
Energy is produced when a body vibrates. The vibrations of the body will be propagated through a medium from one point to another. The energy produced will be in the form of sound waves.

A better understanding of the production of sound by the vibration of a body can be obtained by considering the example of playing the guitar.

When a person plays the guitar, he or she is seen to pluck the strings of the guitar. This plucking action causes the string to vibrate, thereby producing sound. This sound will then propagate through a medium being the air and reaches our ear.
So we can conclude that the vibration of a body generates sound.

Hence the correct option is B.

Note: The vibrations in the air caused by the vibrating body is often referred to as travelling longitudinal waves or sound waves. Thus the sound wave can be generally considered as vibrations in a medium. However, not all sound produced by a vibrating object can be heard by the human ear. There exists a certain range of frequency that can be heard by the human ear and it is termed as audible frequency. If the frequency of vibrations of a body matches that of another body resonance is attained.