Question:
A balloon is filled with hydrogen. For sound waves, this balloon behaves like
A balloon is filled with hydrogen. For sound waves, this balloon behaves like
Updated On: Jul 28, 2022
- a converging lens
- a diverging lens
- a concave mirror
- None of the above
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The Correct Option is B
Solution and Explanation
As density of hydrogen is less than density of air, velocity of sound in hydrogen is greater than velocity of sound in air. Therefore, hydrogen acts as a rarer medium and the balloon behaves as a diverging lens.
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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.