Two sources of sound placed close to each other are emitting progressive waves given by y_1=4 \sin 600 \pi t and y_2=5 \sin 608 \pi. An observer located near these two sources of sound will hear :

Correct Answer is : 4 beats per second with intensity ratio 81:1 between waxing and waning

4 beats per second with intensity ratio 25: 16 between waxing and waning.

8 beats per second with intensity ratio 25: 16 between waxing and waning

8 beats per second with intensity ratio 81: 1 between waxing and waning

4 beats per second with intensity ratio 81: 1 between waxing and waning

AIPMT 2012 Physics and Chemistry Paper

Question : 49 of 100

Marks: +1, -0

Two sources of sound placed close to each other are emitting progressive waves given by y1=4‌sin‌600‌π‌t and y2=5‌sin‌608‌π. An observer located near these two sources of sound will hear :

4 beats per second with intensity ratio 25:16 between waxing and waning.
8 beats per second with intensity ratio 25:16 between waxing and waning
8 beats per second with intensity ratio 81:1 between waxing and waning
4 beats per second with intensity ratio 81:1 between waxing and waning

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