1 Answers
Option 2 : Produce intense heating effect when passed through a substance
CONCEPT:
- Sound waves are longitudinal mechanical waves and frequency can be defined as the number of wave cycle happening in one sec.
- Ultrasonic waves or Ultrasound waves: The sound frequency above 20,000Hz (upper audible limit of human hearing) is known as ultrasonic waves. Humans cannot detect it too.
- Examples: Bat produce Ultrasonic waves.
EXPLANATION:
- Ultrasonic waves are transmitted in a medium over a longer distance with no appreciable loss of energy, but it cannot propagate in vacuum.
- The velocity remains constant in homogeneous medium.
- If it is passing through a substance then it produces a heating effect. So option 2 is correct.
4 views
Answered