Human ear can sense sound waves travelling in air having wavelength of :
a)10-3m
b) 10-2m
c) 1 m
d) 102m
Explain with reason
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Human ear can sense sound waves travelling in air having wavelength of :
a)10-3m
b) 10-2m
c) 1 m
d) 102m
Explain with reason
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Answer:
(C) 1 m
Explanation:Human ears can sense sound waves travelling in air whose frequencies f lie in the range of 20Hz to 20kHz
The average speed v of sound in air is 335m/s
Wavelength λ=
f
v
Hence the wavelength range of audible sounds is
20000
335
to
20
335
That is 1.675×10
−2
metres to 16.75 metres
You can see that among all the 4 options given, only 1m
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