The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of frequencies 9Hz and 11Hz is:
A
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B
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C
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D
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Solution
The correct option is C Given:
Frequencies of two waves 9Hz and 11Hz
Beat frequency =difference in frequencies of two waves =11−9
Beat frequency=2Hz
From the given graphs option (C) represents the correct graph.