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physics doubt!!!!

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spiderman:
Hey guys.....pls cud ul help me wit this sum............its urgent cus ie got m test tomorrow..... :)
i donno how to solve q. 5 part 2n the attached pst paper.....
pls help mee as quickly as possible..........

astarmathsandphysics:
One mo

astarmathsandphysics:
The two sources must be equal in intensity and out of phase by 180 when the waves arrive at M.

spiderman:
Thanks a lot astar but can u pls show the working......on how to get the minima

astarmathsandphysics:
I just read the question properly. Both sources are always in phase so have some same frequancy and wavellenth.

S2M-S1M=n*wavelength and and M must always be at a minimum for both sources.

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