Two speakers are placed as shown in Fig.7.98. Mark out the correct statement(s) A. If a person is moving along `AB` , he will hear the sound as loud , faint , loud and so onB. If a person moves along `CD`, he will hear loud , faint , loud and so onC. If a person moves along `AB` , he will hear uniform intense soundD. If a person moves along `CD` , he will hear uniform intense sound

Two speakers are placed as shown in Fig.7.98. Mark out the correct sta

1.	Two speakers are placed as shown in Fig.7.98. Mark out the correct statement(s) A. If a person is moving along `AB` , he will hear the sound as loud , faint , loud and so onB. If a person moves along `CD`, he will hear loud , faint , loud and so onC. If a person moves along `AB` , he will hear uniform intense soundD. If a person moves along `CD` , he will hear uniform intense sound
Answer» Correct Answer - B::C At any point on line `AB` , the phase difference between two waves is zero and hence waves will interfere constructively . Along `CD` , the phase difference changes and waves interfere constructively and destructively and , hence sound will be loud , faint and so on .

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