Physics-
General
Easy

Question

The minimum audible wavelength at room temperature is about

  1. 0.2 blank Å    
  2. 5 blank Å    
  3. 5 cm to 5 metres     
  4. 20 mm    

The correct answer is: 20 mm


    Since maximum audible frequency is 20000 blank H z comma
    Hence lambda subscript m i n end subscript equals fraction numerator v over denominator n subscript m a x end subscript end fraction equals fraction numerator 340 over denominator 20000 end fraction almost equal to 20 blank m m

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