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Figure 13 shows two identical dippers A and B vibrating in water in phase with each other. The dippers have the same constant frequency and amplitude. The waves produced are observed along line MN:

      

Figure 13 shows two identical dippers A and B vibrating in water in phase with each other. The dippers have the same constant frequency and amplitude. The waves produced are observed along line MN:
physics5262017228.jpg
It is observed that the amplitude are maximum at points P and R.
(i) Explain why the amplitude is maximum at Q.
(ii) State why the amplitude is minimum at R.
(iii) State what would happen if the two dippers had different frequencies.

  

Answers


John
(i) Q Represents regions of constructive interference.

(ii) R represents regions of destructive interference

(iii) The two sources will not be coherent therefore no interference will occur.
johnmulu answered the question on May 26, 2017 at 11:33


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