Advertisements
Advertisements
प्रश्न
What are infrasonic waves?
Advertisements
उत्तर
The waves of frequency below 20 Hz are called infrasonic waves.
APPEARS IN
संबंधित प्रश्न
Why are the ceilings of concert halls curved?
What is the condition necessary for an echo to be heard distinctly?
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
