Question

When a tuning fork produces sound waves in air, which one of the following is the same in the material of tuning fork as well as in air ?

• A. Wave length
• B. Frequency
• C. Velocity
• D. Amplitude

Answer 1

The correct option is B Frequency

Sound waves are produced by vibrating objects.

When the tuning fork is hit with a rubber hammer, the tines begin to vibrate. The back and forth vibration of the tines produce disturbances of surrounding air molecules. Since the vibration of air molecules is solely due to vibration of nearby tine of tuning fork,so it means the number of vibration of air molecules will be equal to number of vibration of tine of the tuning fork.So frequency ,which is number of vibrations per second, will be same for both the tuning fork and the air.