Author Question: The figure shows two point sources of light, A and B, that emit light waves in phase with each ... (Read 104 times)

maychende · **on:** Jul 28, 2018

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.