1.

What are the Equation of beats ?

Answer»

Equation of beats : If two waves of equal amplitudes ‘a’ and slightly different frequencies n1 and n2 travelling in a medium in the same direction then equation of beats is given by 

y = A sin π (n1 – n2)t where A = 2a cos π (n1 – n2)t = Amplitude of resultant wave. Amplitude of resultant wave.

Beat frequency : n = n1 – n2

Beat period: 1/Beat frequency = 1/n1 – n2



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