if two waves of amplitude A produces a resultant wave of amplitude A then two waves have phase difference of ?
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use formula,
Ar = √( A1² +A2² +2A1.A2cos∅)
here A1 =A
A2 = A
Ar =A
then ,
A =√(A² + A² +2A² cos∅)
A² = 2A² +2A²cos∅
cos∅ = -1/2
hence,
∅ ( phase ) = 2π/3 , 4π/3
Ar = √( A1² +A2² +2A1.A2cos∅)
here A1 =A
A2 = A
Ar =A
then ,
A =√(A² + A² +2A² cos∅)
A² = 2A² +2A²cos∅
cos∅ = -1/2
hence,
∅ ( phase ) = 2π/3 , 4π/3
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