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In the figure shown below, a source of s...


In the figure shown below, a source of sound having power `12xx10^-6W` is kept at `O`, which is emitting sound waves in the directions as shown. Two surfaces are labelled as 1 and 2 having areas `A_1=2xx10^3m^2` and `A_2=4xx10^3m^2`, respectively
Q. find the intensity at both the surfaces.

A

A will hear a quiter sound.

B

B will hear quiter sound

C

Both will hear the same sound.

D

Cannot say anything.

Text Solution

Verified by Experts

The correct Answer is:
C
Power received by `A's` ear is `I_1xxA_A=12xx10^(-15)W`
Power received by B's ear is `=I_1xxA_A=12xx10^(-15)W` so, both hear the same sound.
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CENGAGE PHYSICS ENGLISH-SOUND WAVES AND DOPPLER EFFECT-Comprehension
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