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प्रश्न
How does sound travel in air?
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उत्तर
Sound travels in air as a longitudinal wave through the vibration of air molecules. When a sound source vibrates, it creates compressions (high pressure) and rarefactions (low pressure) that propagate through the air. These pressure variations transfer sound energy from one molecule to another, allowing the wave to travel. The sound reaches our ears, causing the eardrum to vibrate, which is then processed by the brain as sound. Since sound needs a medium, it cannot travel in a vacuum.
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संबंधित प्रश्न
In which units is the loudness of sound measured?
State the safe limit of sound level in terms of decibel for human hearing.
Name three characteristics of a musical sound.
Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.
If the amplitude of a wave is doubled, what will be the effect on its loudness?
Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of frequencies?
Name the unit in which loudness of sound is measured.
Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality? Give a reason for your answer.
Two waves of the same pitch have amplitudes in the ratio 1 : 3. What will be the ratio of their :
(i) intensities and
(ii) frequencies
