PHYSICS [3 Mark Question Answer]

Three Important uses of echolocation:
(i) It helps animals to communicate with each other. e.g dolphins use the echolocation to communicate with other dolphins.
(ii) It helps in navigation and to locate their prey.
(iii) It is used by them to hunt for the meal.

Sound waves are produced by the object motion back and forth in the medium. Due to which it compresses the medium and compression waves are moved forward. The sound travels in the medium through energy transfers by wave motion from one place to another. For example, when the prong of the tuning fork vibrates, the waves start moving from one fork to another, the air starts getting compressed. The compression is pushed forward. Now, when the fork vibrates in another direction, the air in the immediate neighbor which was compressed, now gets rarefied. As a result, a series of compression and rarefactions are produced and sound energy travels in the direction where compression and rarefactions travel.

The following are the three characteristics of the medium required for the propagation of sound:
(i) The medium must possess elasticity so that the particles of the medium have the tendency to return back to their original positions.
(ii) The medium must be frictionless so that there is no loss of energy during transmission.
(iii) The medium must possess inertia such that the particles of the medium have the ability to store energy.

Sound is defined as form of energy that produces the sensation of hearing in our ears. The sound travels in medium through energy transfers by wave motion from one place to another. For example , when the prong of the tuning fork vibrate , the waves start moving from one fork to another , the air start getting compressed . The compression is pushed forward. Now, when the fork vibrate in another direction, the air in the immediate neighbor which was compressed, now get rarefied. As a result, a series of compression and rarefactions are produced and sound energy travels in the direction where compression and rarefactions travel.

The following are the requisites of medium to travel:
(i) The medium should possess elasticity so that particles of the medium have the tendency to come back to their original position after the displacement.
(ii) The medium should be frictionless so that there should be a loss of energy.
(iii) The medium must possess inertia so that particles of the medium have the ability to store energy.