Determine if radio waves are constructive or destructive

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Homework Help Overview

The discussion revolves around determining whether the interference at a specific point from two radio antennas emitting radio waves is constructive or destructive. The original poster has identified the wavelength and path difference but is uncertain about the implications of the antennas being out of phase.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are exploring the relationship between phase difference and interference type, questioning the conditions under which constructive or destructive interference occurs. There is a focus on the implications of the antennas being out of phase and how that affects the interference at the specified point.

Discussion Status

The discussion is ongoing, with participants raising questions about the phase relationship of the antennas and its impact on interference. Some have suggested that if the antennas were in phase, constructive interference would occur, but the current scenario involves out-of-phase conditions, leading to confusion about the expected outcome.

Contextual Notes

The original poster has noted that the problem does not explicitly state the phase relationship, which is a critical factor in determining the type of interference. There is also a mention of specific coordinates for the antennas and the point of interest, which may influence the analysis.

PCSL
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I don't think I have to write out the problem but let me know.

There are two radio antennas emitting radio waves and a point was given to me to determine if constructive or destructive at that point.

I found the wavelength is 100m and the path difference is 200m. How can I determine if it is constructive or destructive??

edit: they are out of phase
 
Last edited:
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I'm going to bed soon and would lose if someone could help me out prior?
 
Do you mean they are out of phase (by 180°) as they are transmitted at the radio antennas?
 
SammyS said:
Do you mean they are out of phase (by 180°) as they are transmitted at the radio antennas?

I would assume so but the problem does not say.

Here is the full problem:

Two out-of-phase radio antennas at x = +/- 300m on the x-axis are emitting 3MHz radio waves.Is the point (300,800) a point of maximum constructive interference, perfect destructive interference, or something in between?

It seems like this would be constructive but the answer is perfectly destructive and it makes no sense.
 
If the antennas were in-phase, then there would be constructive interference.
 
SammyS said:
If the antennas were in-phase, then there would be constructive interference.

It is out-of-phase though.
 

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