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Two waves of nearly same amplitude , sam...

Two waves of nearly same amplitude , same frequency travelling with same velocity are superimposing to give phenomenon of interference . If `a_(1)` and `a_(2)` be their respectively amplitudes , `omega` be the frequency for both , `v` be the velocity for both and `Delta phi` is the phase difference between the two waves then ,

A

the resultant intensity varies periodically with time and distance.

B

the resultant intensity with `(I_("min"))/(I_(max)) = ((a_1 - a_2)/(a_1 + a_2))^2` is obtained

C

both the waves must have been travelling in the same direction and must be coherent.

D

`I_s = I_1 + I_2 + 2 sqrt(I_1 I_2) cos (Delta pi)` where constuctive interference is obtained for path differences that are even multiple of `1/2 lamda ` and destructive interference is obtained for path differences that are odd multiple `1/2 lamda `

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A, B, C, D
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