Electromagnetic Waves: Coils, Transmitters & Energy

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Discussion Overview

The discussion revolves around the transmission and reception of electromagnetic waves using coils, focusing on the nature of the waves emitted by a transmitter, the distribution of energy among them, and the characteristics of the signal being transmitted. The scope includes theoretical considerations of electromagnetic radiation and practical aspects of signal modulation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether a transmitter emits a single electromagnetic wave or multiple waves, and how energy is distributed among them.
  • Another participant suggests that the concept of counting electromagnetic waves is not meaningful, comparing it to counting water.
  • A participant inquires about the frequency of the transmitter and the modulation type of the signal.
  • There is a question about whether power is divided among the waves or if each wave carries the same amount of power.
  • A participant provides information that the transmitter operates at approximately 6 MHz with amplitude modulation.
  • Another participant explains that the energy radiated will be in a band centered on the carrier frequency and that the energy falls off with distance, raising questions about the meaning of "every wave" in terms of power and energy flow.
  • A participant corrects a previous statement about the emission of electromagnetic waves, noting the use of "emitted" instead of "omitted."

Areas of Agreement / Disagreement

Participants express differing views on the nature of electromagnetic wave emission and energy distribution, with no consensus reached on whether power is equally divided among waves or if each wave possesses the same power.

Contextual Notes

Participants have not fully resolved the implications of modulation on wave amplitude and energy distribution, and there are assumptions about the definitions of power and energy flow that remain unexamined.

Akmalidin
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I have coils to transmit and receive the power supplied.When we supply the transmitter , it omit the electromagnetic wave.Does it omit one electromagnetic wave or a lot of them? If there are several of them, is the energy supplied ,divided equally to the number of waves or every wave carries the same amount of power?
 
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"A lot of electromagnetic waves" would be like "a lot of water". You cannot count it in a meaningful way.
 
Is the power divided or every wave possesses the same power?
 
Transmitter is in about 6 Mhz. it is amplitude modulation.
 
The energy radiated will be in a band with twice the frequency of the modulation, centred on the carrier frequency.
The EM waves will radiate as spherical waves so the energy will fall with distance, proportional to 1/d2.

Your statement “every wave possesses the same power” does not immediately make sense. Power is the rate of energy flow. Energy is carried in the wave. The amplitude of the wave varies with carrier power, modulation and distance propagated. Modulation changes the amplitude with time. What do you mean by “every wave”?
 
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Akmalidin said:
it omit the electromagnetic wave.Does it omit one electromagnetic wave or a lot of them?

and EM waves are Emitted not omitted :wink:
 

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