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Mechanical Properties Of Fluids

Question
CBSEENPH11018817

Is first resonance length equal to λ /4, where straight lambda is the wavelength of stationary longitudinal wave produced in the air column? 

Solution
Given, 
Resonance length = straight lambda over 4 
where, straight lambda is the wavelength of the stationary longitudnal wave. 
So, first resonance length produced in the air column is less than λ/4.