Last Updated On 16-03-2023 - By Jeesha Sara
Three waves of equal frequency having amplitudes 
arrive at a given point with successive phase difference of 
, the amplitude of the resulting wave in 
is given by
Question ID - 150082 :- Three waves of equal frequency having amplitudes arrive at a given point with successive phase difference of , the amplitude of the resulting wave in is given by
Three waves of equal frequency having amplitudes arrive at a given point with successive phase difference of , the amplitude of the resulting wave in is given by
The amplitudes of the waves are
and 
and the phase difference between 1st and 2nd wave is 
and that between 2nd and 3rd is 
. Therefore, phase difference between 1st and 3rd is 
. Combining 1st with 3rd, their resultant amplitude is given by
Or 
in the direction of first
Now combining this with 2nd wave we have, the resultant amplitude
Or 
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