Physics-
General
Easy

Question

Figure, shows a stationary wave between two fixed points P and Q. Which point(s) of 1, 2 and 3 are in phase with the point X?

  1. 1, 2 and 3    
  2. 1 and 2 only    
  3. 2 and 3 only    
  4. 3 only    

The correct answer is: 3 only

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