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Write true or false for a given statement.
A ticking clock sound is heard late when heard through a metal.
To detect the obstacles in their path, bats produce ______.
State the general name of the waves in which the particles of the medium vibrate :
(i) in the same direction as wave.
(ii) at right angles to the direction of wave.
What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.
An observer X is on an island 5500 m from a vertical cliff on the shore. A ship Y is anchored between the island and the Cliff. A blast on the ship’s siren is heard twice by X, the interval being 5s. [Velocity of sound = 330 ms−1]
(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
A medium is necessary for ______ of sound.
The diagram given below shows a displacement distance graph of a wave. If the velocity of wave is 160 ms-1, calculate:
- wavelength
- frequency
- amplitude.
Distinguish between light and sound waves. What are the consequences of the large difference in the speed of sound and that of light? Briefly explain them.
What do you understand by the term echo?
