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प्रश्न
State two conditions for an echo to take place
उत्तर
The conditions for an echo to take place are
1)The minimum distance between the source of the sound and the reflector in the air must be 17 m
2) The size of the reflector must be large enough as compared to the wavelength of the sound wave.
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संबंधित प्रश्न
The lower the frequency of vibration, the higher is the pitch.
Name the characteristic of sound related to its frequency
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
- Which of the following quality determines the loudness of a sound wave?
- wavelength
- frequency and
- amplitude
- How is loudness related to the quantity mentioned above in part (a)?
Explain the following and illustrate your answer by drawing appropriate diagram:
Quality of a musical note.
The diagram below shows three ways in which the string of an instrument can vibrate.
(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
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.
What does the intensity of sound depend upon?
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
