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प्रश्न
What is an echo
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उत्तर
The sound heard after reflection from a distant obstacle after the original sound has ceased is called an echo.
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संबंधित प्रश्न
The lower the frequency of vibration, the higher is the pitch.
State two conditions for an echo to take place.
A tuning fork produces sound of ................... frequency.
When sound travels in form of a wave
Obtain relationship between the time period and frequency.
Name the characteristic of sound related to its frequency
Name the unit in which loudness of sound is measured.
A 0.6 m long stretched wire is made to vibrate in two different modes as shown in figure
(a)
(b)
(i) If the frequency of the note produced in (b) is n, what is the frequency in case (a)?
(ii) In which case (a) or (b), is the note louder? Give reasons.
(iii) In which case is the pitch higher? Give reason.
Give a scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
