What are the conditions necessary for an echo?why?
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echo is an repetation of the original sound of reflection by some surface.
to hear distinct echo the minimum distance should be half of 17.2m.
to hear distinct echo the minimum distance should be half of 17.2m.
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Conditions necessary for an echo:
1. The minimum distance between the source of sound and reflector is 17m in the air and in water is 70m. It is different in different media.
2. The size of reflector must be large enough as compared to the sound of wavelength.
3. The intensity should be such that the reflected reaching our ears is sufficiently audible.
1. The minimum distance between the source of sound and reflector is 17m in the air and in water is 70m. It is different in different media.
2. The size of reflector must be large enough as compared to the sound of wavelength.
3. The intensity should be such that the reflected reaching our ears is sufficiently audible.
Anonymous:
thanks
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