Choose the correct answer.
Sound can travel through
Sound can travel through
- gases only
- solids only
- liquids only
- solids, liquids and gases.
The Correct Option is D
Solution and Explanation
Sound is a mechanical wave that requires a medium for propagation. It can travel through solids, liquids, and gases because it relies on the vibration of particles in the medium. In solids, particles are closely packed and transmit vibrations effectively. In liquids, particles are less dense but can still transmit sound waves. In gases, despite being less dense than solids and liquids, sound waves can travel through the compression and rarefaction of gas particles. Therefore, sound is capable of traveling through all three states of matter: solids, liquids, and gases.
So, the correct option is (D): solids, liquids and gases.
Questions Asked in CBSE Class VIII exam
(a) Find out the position of the image of an object situated at A in the plane mirror.
(b) Can Paheli at B see this image?
(c) Can Boojho at C see this image?
(d) When Paheli moves from B to C, where does the image of A move?- CBSE Class VIII
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(i) the length of the shadow cast by another pole 10 m 50 cm high
(ii) the height of a pole which casts a shadow 5 m long.- CBSE Class VIII
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- Sitar
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Concepts Used:
Sound
Sound is a vibration that propagates the mechanical wave of displacement and pressure, through a medium can be of any matter. In other words, the sound is the thin line between Music sound and Noise.
Types of Sounds:
Sound can be divided into two types depending on its frequency. The following are:-
Infrasonic Waves:
- Infrasonic waves have a frequency lower than 20 Hz. Since it is below the human hearing range, it is inaudible to humans.
- However, several other living organisms use these waves to communicate, whales, sharks, elephants, hippopotamus, etc. these waves are also used in the scientific field, it is used to study upcoming earthquakes, volcanic eruptions, human heart rates, rock formation stages, etc.
Ultrasonic waves:
- Ultrasonic waves have a frequency higher than 20 kHz. Since it is above the human hearing range, it is inaudible to humans.
- These waves are used in the scientific field, it is used to study human heart rates, to take sonograms, navigation of directions, imaging things, uniform sample mixing, communication, testing of samples, etc.