Consider the phenomenon of beats & select the correct statement.(a) It occurs when frequencies are close or equal(b) It correspond to the change in intensity we hear due to interference of 2 waves having close frequencies(c) It corresponds to a constant intensity sound heard during wave interference(d) Beat frequency is variableThis question was posed to me during an interview.My query is from Waves topic in section Waves of Physics – Class 11

Consider the phenomenon of beats & select the correct statement.(a) It

1.	Consider the phenomenon of beats & select the correct statement.(a) It occurs when frequencies are close or equal(b) It correspond to the change in intensity we hear due to interference of 2 waves having close frequencies(c) It corresponds to a constant intensity sound heard during wave interference(d) Beat frequency is variableThis question was posed to me during an interview.My query is from Waves topic in section Waves of Physics – Class 11
Answer» The correct ANSWER is (b) It correspond to the change in intensity we HEAR due to interference of 2 WAVES having close frequencies Best explanation: When two waves with close, but not equal, frequencies interfere, beats are produced. They have a frequency equal to the average frequency of the two interfering waves and we recognize them as the variable intensity SOUND we hear.

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