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 | SaraNextGen Answer 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
1 Answer - 5876 Votes
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Answer Key : (5) -
Answer LinkThe 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 
