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Two waves of nearly same omplitode. same frequency travelling with same velocity are superimposing to give phenomenon of interference. If a_1 and a_2 be their respective amplitudes, omegato be frequency for both, Deltaphibe the velocity for both and Delta_(0)is the phase difference between the two waves then,

Answer»

the RESULTANT intensity varies periodically with time and distance.
the resultant intensity with `I_("min")/I_("max") =((a_(1)-a_(2))/(a_(1) + a_(2)))^(2)` is obtained.
both the waves must have been TRAVELLING in the same direction and must be coherent.
`I_(s) = I_(1) + I_(2) + 2sqrt(I_(1) I_(2)) cos (Deltapi)` where CONSTRICTIVE interference is obtained for path differences that are even multiple of `1/2 lambda`and destructive interference is obtained for path differences that are odd multiple of `1/2 lambda`.

ANSWER :A::B::C::D


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