Longest EM Wave Length: Man-Made or Natural?

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Discussion Overview

The discussion revolves around the question of the longest electromagnetic (EM) wavelength, both man-made and natural. Participants explore various aspects of this topic, including theoretical considerations and speculative ideas related to particle physics and dark matter.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants inquire about the longest EM wavelength, expressing curiosity about both natural and man-made sources.
  • One participant mentions a previous inquiry into the longest and shortest wavelengths, suggesting that the shortest may be limited to the Planck length.
  • There is speculation that the discovery of the least massive particle could lead to the generation of the lowest frequency EM waves.
  • Galactic-sized wavelengths associated with dark matter are introduced as a topic of interest, with requests for further information and links.
  • One participant calculates that producing a wave with a peak-to-peak distance of 100,000 light years would take 100,000 years, indicating a consideration of the time required for such waves to form.
  • A participant humorously claims to be creating the world's longest wavelength signal, indicating a light-hearted approach to the discussion.

Areas of Agreement / Disagreement

The discussion does not reach a consensus on the longest EM wavelength, and multiple competing views and speculative ideas remain present among participants.

Contextual Notes

Participants express uncertainty regarding the definitions and implications of the longest wavelengths, particularly in relation to dark matter and theoretical particles. The discussion includes unresolved questions about the nature of these wavelengths.

wolram
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A basic question i know, but what is the longest em wave length
man made or natural?
 
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wolram said:
A basic question i know, but what is the longest em wave length
man made or natural?

I’ve often wondered about this, years ago I asked a similar question “longest and shortest”. The latter possibly limited to the Planck length. The longest, I don’t think I got an answer. If and when the least massive particle is found, I suppose that will generate the lowest frequency. I recall reading lately about the galactic size wavelengths of “dark matter”.
 
by GENIERE
I've often wondered about this, years ago I asked a similar question "longest and shortest". The latter possibly limited to the Planck length. The longest, I don't think I got an answer. If and when the least massive particle is found, I suppose that will generate the lowest frequency. I recall reading lately about the galactic size wavelengths of "dark matter".
------------------------------------------------------------------------
Galactic sized wavelengths of dark matter sounds interesting, do
you have a link?
I was thinking about the time it takes to produce such waves and
the source.
 
wolram said:
I was thinking about the time it takes to produce such waves...

That seems elementary. To produce a wave that's 100,000 light years peak-to-peak ... would take 100,000 years.
 
Thanks GENIERE .
 
I am as we speak creating the worlds longest wavelength signal. I'll let you know when it completes its first cycle. :smile:
 

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