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Two coherent point of sound wave S(1) an...

Two coherent point of sound wave `S_(1)` and `S_(2)` produce sound of same frequency `50 Hz` and wavelength `2cm` with amplitude `2xx10^(-3)m`. Each circular are represents a wavefront at a particular time and is separated from next arc by a distance `1cm`. Both the sound waves propagate through the medium and interfere with each other. Read paragraph carefully and answer the following questions. `[r=1cm]`
The points of minimum intensity will occur at

A

`F` and `R`

B

`G` and `P`

C

`G` and `F`

D

`F` and `P`

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