Register to reply

Interference of two radio waves

by username12345
Tags: waves
Share this thread:
Jun2-09, 03:15 AM
P: 48
1. The problem statement, all variables and given/known data

Two coherent sources of radio waves, A and B, are 5.00 meters apart. Each source emits waves with wavelength 6.00 meters. Consider points along the line connecting the two sources.

At what distance from source A is there constructive interference between points A and B?

2. Relevant equations

Let P be the point of constructive interference:

[tex]r_1 - r_2 = m\lambda [/tex] where [tex]r_1 [/tex] is the distance from A to P and [tex]r_2[/tex] is the distance from P to B.

These were the hints given, and don't make sense.

3. The attempt at a solution

I got the answer of 2.5 metres by drawing a diagram and estimating where the two waves would cross (constructive interference). The answer was correct, a lucky guess...

I don't know how to apply that equation. Does it need to be applied twice? For m I would use the value of 1?
Phys.Org News Partner Science news on
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
Jun2-09, 07:52 PM
Redbelly98's Avatar
P: 12,070
m could be any integer, not just 1.

Try m = 0 or 1, and see what you can come up using your equation,
r1 - r2 = m λ

Register to reply

Related Discussions
Radio waves: constructive and destructive interference 1-dimension Introductory Physics Homework 7
Two Radio Transmitters, Interference, and Waves Introductory Physics Homework 4
Why cant u make radio transmitter that transmit visible light instead of radio waves? Introductory Physics Homework 1
Radio Wave Interference Introductory Physics Homework 9
Radio Waves Biology 6