Question

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​

Answer 1

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

Answer 2

Answer:

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