1.

Two coherent sources A and B of radio waves are 5.00 m apart. Each source emits waves with wavelength 6.00m. Consider points along the line between the two sources. Atwhat distances, if any, from A is the interference (a) constructive (b) destructive?

Answer»

SOLUTION :(a) Atcentre path difference is ZERO. Therefore, CONSTRUCTION interference will be obtained.
(B) `lambda/2 = 3m.` At a distance, where path difference is `lambda/2 or 3m` destructive interference will be obtained.

At`P_1BP_1 -AP_1 = 3m = lambda/2`
At `P_2 = AP_2 - BP_2 = 3m = lambda/2`.


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