A point source emits sound equally in all directions in a non-absorbing medium. Two point `P` and `Q` are at distance of `2 m` and `3 m` respectively from the source. The ratio of the intensities of the wave at `P` and `Q` is :A. `9:04:00 AM`B. `2:03:00 AM`C. `3:02:00 AM`D. `4:09:00 AM`

A point source emits sound equally in all directions in a non-absorbin

1.	A point source emits sound equally in all directions in a non-absorbing medium. Two point `P` and `Q` are at distance of `2 m` and `3 m` respectively from the source. The ratio of the intensities of the wave at `P` and `Q` is :A. `9:04:00 AM`B. `2:03:00 AM`C. `3:02:00 AM`D. `4:09:00 AM`
Answer» Correct Answer - A Intensity of sound `I=(P)/(4pir^2)` or `1prop(1)/(r^2)` or `(I_1)/(I_2)=((r_2)/(r_1))^2` Here `r_1=2m,r_2=3m` Substituting the values, we have `(I_1)/(I_2)=((3)/(2))^2=(9)/(4)`

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A point source emits sound equally in all directions in a non-absorbing medium. Two point `P` and `Q` are at distance of `2 m` and `3 m` respectively from the source. The ratio of the intensities of the wave at `P` and `Q` is :A. `9:04:00 AM`B. `2:03:00 AM`C. `3:02:00 AM`D. `4:09:00 AM`

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