Physics · Wave motion, longitudinal and transverse waves, speed of the travelling wave, displacement relation for a progressive wave
Assertion Ultrasonic waves are longitudinal waves of frequency greater than 20,0
Assertion Ultrasonic waves are longitudinal waves of frequency greater than 20,000 \( \mathrm{Hz} \) Reason The maximum frequency of audible sound waves is \( 20,000 \mathrm{Hz} \)
- A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- C. Assertion is correct but Reason is incorrect
- D. Assertion is incorrect but Reason is correct
Step-by-step solution
Ultrasonic waves are longitudinal sound waves with frequencies above the audible range, which typically ends at 20,000 Hz. The reason correctly states that the maximum audible frequency is 20,000 Hz, explaining why waves with higher frequencies are classified as ultrasonic.
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