A planar cross section through two spherical waves emanating from ...

[Kthamas]

A planar cross section through two spherical waves emanating from the sources S₁ and S₂ in the plane is shown in the figure. The black circles are one and two wavelengths from their respective sources. The lighter circles are one half and one and a half wavelengths distant from their respective sources. If the phase at S₁ and S₂ is zero at this instant, and the waves shown arriving at P₁ both arrive with amplitude A, the magnitude of the phase angle of each wave at point P₁ (in radians) is
 
   

   
  a.
  0.
   
  b.
  .
   
  c.
  2.
   
  d.
  3.
   
  e.
  /2.

Question 2

A planar cross section through two spherical waves emanating from the sources S₁ and S₂ in the plane is shown in the figure. S₁ and S₂ are in phase. The black circles are one and two wavelengths from their respective sources. The lighter circles are one half and one and a half wavelengths distant from their respective sources. If the waves shown arriving at P₂ both arrive with amplitude A, the resultant amplitude at point P₂ is
 
   

   
  a.
  0.
   
  b.
  .
   
  c.
  A.
   
  d.
  .
   
  e.
  2A.

[DHRUVSHAH]

Answer to Question 1

d

Answer to Question 2

a

[Kthamas]

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[DHRUVSHAH]

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