Two radio frequency sources `S_(1)` and `S_(2)`, separated by distance 2.5 m emitting in phase waves of wavelength 1m. A detector moves in a large circular path around the two sources in a plane containing them. The number of maxima that will be detected by it over the complete circular path. are
A
16
B
12
C
10
D
8
Text Solution
Verified by Experts
The correct Answer is:
C
At point A, the path difference is `2.5 lambda` and at B, path difference is zero. While moving from A to B, path difference change from 2.5 to zero, making two maxima corresponding to `2lambda` and `lambda` (excluding B), B is common for both upper, quarter circles hence there are five maxima in one half cirlce, making 10 n total circular movement.
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