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  • Which of the following statements are true about interferance of sound wave?Option: 1 When the waves meets with same phase, it forms constructive int

Which of the following statements are true about interferance of sound wave?

Option: 1

When the waves meets with same phase, it forms constructive interference  


Option: 2

When the waves meets with opposite phase, it forms destructive interfernece  


Option: 3

none of this


Option: 4

both 1 and 2


Answers (1)

best_answer

 

Constructive interference Destructive interference
1. When the waves meets with same phase, it forms constructive interfernece   1. When the waves meets with opposite phase, it forms destructive interfernece  

2. Phase difference at the point of observation.

\delta = 0^o \ or \ 2n \pi

 2. Here, phase difference = 180^o\ or \ (2n-1) \pi \ where \ n=1,2,3...
3. Path difference = n \lambda 3. Path difference = (2n-1) \frac{\lambda}{2}
4. Resultant amplitude = A_{max} = a_1+a_2

4. Resultant amplitude = 

A_{min} = a_1-a_2
5. Resultant intensity will be maximum = I_{max}=I_1+I_2+2{\sqrt{I_1I_2}} 5. Resultant intensity will be minimum = I_{max}=I_1+I_2-2{\sqrt{I_1I_2}}

 

Posted by

shivangi.shekhar

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