Section C: Give a short answer to the question given below.
a. What do you understand by the term Ultrasonic Vibration?
b. What is meant by reflection of sound?
b. What is meant by reflection of sound?
a. These are sound waves with a frequency , Human ear these waves, but certain creatures like mosquito, dogs, bats, dolphins these waves.
b. When sound waves pass through in a given medium and hits the surface of another medium, they can be .
The waves that strike the interface between two media are termed as the and the waves that bounce back are termed as the .