Sound WavesHard
Question
Waves from three soures of the same intensity and frequencies 2003, 2005 and 2013 Hz superimpose. The number beats per second is :
Options
A.8
B.10
C.17
D.20
Solution
2Hz →
(Total 2 maxima in 1s)8Hz →
(Total 8 maxima in 1s)10Hz →
(Total 10 maxima in 1s)
But
So number of beats = (10 + 8 + 2) - (3) = 17
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