The figure shows two point sources of light, A and B, that emit ...

[maychende]

The figure shows two point sources of light, A and B, that emit light waves in phase with each other. A is a distance of 3 from point P. B is distant 5 from P. ( is the wavelength.) The phase difference between the waves arriving at P from A and B is
 
 
 
   
  a.
  0 rad.
   
  b.
  rad.
   
  c.
  2 rad.
   
  d.
  3 rad.
   
  e.
  4 rad.

Question 2

You are tuning a guitar by comparing the sound of the string with that of a standard tuning fork. You notice a beat frequency of 5 Hz when both sounds are present. You tighten the guitar string and the beat frequency rises steadily to 8 Hz. To tune the string exactly to the tuning fork, you should
  1.continue to tighten the string.
  2.loosen the string.
  3.impossible to determine from the given information.

[welcom1000]

Answer to Question 1

e

Answer to Question 2

2

[maychende]

Thanks for the timely response, appreciate it

[xiazhe]

Gracias!