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CBSE Class 9 Answered

Two waves produced by different sources are represented by :- Y1 = A sin200(pi)t, and, Y2 = A sin208(pi)t where Y1 and Y2 are displacement and 'A' is the amplitude of the two waves. If these two waves are observed simultaneously, we would observe a.) 8 beats every second b.) 4 beats every second c.) resonance d.) destructive interference  
Asked by acv27joy | 22 Apr, 2018, 11:16: PM
answered-by-expert Expert Answer
Angular frequency of wave-1 = ω1 = 2πf1 = 200π , henve f1 = 100 Hz
Angular frequency of wave-2 = ω2 = 2πf2 = 208π , henve f2 = 104 Hz
 
Beat frequency 104-100 = 4 Hz
Answered by Thiyagarajan K | 23 Apr, 2018, 04:53: PM

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