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In the diagram, S1 and S2 are two coherent wave
sources, which radiate waves spherically in every
direction, and have the same amplitude and frequency at
the sources. The amplitude thus has dependence.
Assuming that the electric field vector is normal to the
page, find the wave intensity along the x axis as a
function of x. (Hint: At P, the amplitudes of the fields
emitted by S1 and S2 are not equal.)
4 m
x² +4²
X

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