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प्रश्न
What is echolocation? How do animals make use of this phenomenon?
उत्तर
Echolocation is defined as sending out sounds to judge the location, size, and motion of objects from the returning echoes. The animals use this phenomenon to locate the obstacles in their path and avoid them so it helps them in navigation and to locate their prey.
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संबंधित प्रश्न
Distinguish between loudness and intensity of sound.
Why are the waves mentioned by you not audible to us?
Give two examples each of longitudinal waves and transverse waves.
We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called :
Fig. shows three ways in which a string of length l in an instrument can vibrate.
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| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
What causes sound?
Define one hertz.
The sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given the speed of sound = 340 m s–1.)
Which of the following statements are correct?
- Sound is produced by vibrations.
- Sound requires a medium for propagation.
- Light and sound both require a medium for propagation.
- Sound travels slower than light.
What happens to the speed of sound when it gases from a solid to a gaseous state?
