Advertisements
Advertisements
प्रश्न
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
Advertisements
उत्तर
The frequency of the sound produced by the movement of a mosquito’s wings lies within the human audible range (20 Hz to 20,000 Hz), whereas the sound produced by the movement of our hands has a frequency below 20 Hz, which is inaudible to humans. Therefore, we can hear the movement of a mosquito's wings but not that of our hands.
संबंधित प्रश्न
If the amplitude of vibration is large, sound is feeble.
State two conditions for an echo to take place
When sound propagates in air, it does not carry energy with it.
The pitch of a stringed instrument is increased by .................. tension in string.
Match the following
| column A | column B |
| (A) Amplitude | (1) frequency |
| (B) Frequency | (2) amplitude |
| (C) Loudness | (3)maximum displacement on either side |
| (D) Pitch | (4) presence of other frequencies |
| (E) Waveform | (5) 1/ time period |
If the amplitude of a wave is doubled, what will be the effect on its loudness?
Name the characteristic of sound related to its frequency
Name the characteristic of the sound affected due to a change in its
(a) amplitude (b) waveform (c) frequency.
When a gun is fired at a distance, why is it that the flash is seen almost instantaneously while the sound is heard a little later?
