- #1
Grapz
- 30
- 0
Homework Statement
A sound source is located somewhere along the x-axis. Experiments show that the same wave front simultaneously reaches listeners at x = -7.0 m and x = 3 m
a) What is the x-coordinate of the source?
b) A third listener is positioned along the positive y-axis. What is her y-coordinate if the same wave front reaches her at the same instant it does the first two listeners?
Homework Equations
Change in phase = 2pi ( change in x) / lamda
The Attempt at a Solution
For a, since its the same wave front, i just took the mid point. I'm not sure if this is correct.
For b. I know that if i can find the wavelength. I can find the velocity of the wave and since the time is the same i can use it to find the distance.
But the problem is, i don't know how to find the wavelength.
The above equation change in phase = 2pi ( change in x ) / lamda
This equation gives me troubles. I don't have the change in phase, and i don't know lamda. SO how do i solve this? Also i don't know if the change in x is -7 - 3 = -10 or 3 - 7 = -4
Please help