Any gas volume vs field interaction?

Click For Summary

Discussion Overview

The discussion revolves around the interaction of gases with applied electromagnetic (E/M) fields and whether such interactions can lead to changes in gas volume. Participants explore theoretical and experimental aspects, including the potential for sound production through these interactions.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions if any gases change volume in response to E/M field changes, excluding thermal effects.
  • Another participant mentions that O2 and other gases can respond to magnetic and electric fields, referencing experiments where dielectrics are drawn into electric fields.
  • A participant expresses curiosity about the mechanism behind O2's interaction with E/M fields, considering possibilities like electrostatic repulsion.
  • Suggestions are made to explore "electrostatic speakers" as a means of interacting with air through E/M fields, noting that significant field strengths may be required.
  • A participant humorously suggests that clapping hands is a form of direct interaction with air.

Areas of Agreement / Disagreement

Participants present various viewpoints on the interaction of gases with E/M fields, but no consensus is reached regarding specific mechanisms or the feasibility of volume changes in gases.

Contextual Notes

The discussion does not clarify the assumptions regarding the types of gases or the specific conditions under which these interactions might occur. The dependence on definitions of "direct interaction" and the required field strengths for practical applications remain unresolved.

wimms
Messages
489
Reaction score
0
I wonder if there are any gases that react to applied E/M field changes by changing their volume? Apart thermal stuff of course. I assume that piezo electrics apply to solids, but how about gases?
 
Engineering news on Phys.org
O2 in a magnetic field (probably some others); any gas in an electric field (remember the experiment in which dielectrics are "pulled" into the field?). Anything in particular you're hunting?
 
hmm, weird. I have checked this thread, but saw no answer to it. Now I see it was answered next day. weird..

Thanks for your hint. I'm thinking about how would it be possible to produce audible sound with as direct interaction with air as possible.
What is the mechanism with O2? Electrostatic repulsion? or something else?
 
Last edited:
You might browse "electrostatic speakers" for particulars on a nearly direct interaction with air. Driving air itself with E/M fields is going to take field strengths that might be beyond handling.
 
How about clapping your hands ? Isn't that direct interaction with the air.
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
938
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 18 ·
Replies
18
Views
13K
Replies
16
Views
4K
  • · Replies 3 ·
Replies
3
Views
4K
Replies
3
Views
2K
Replies
4
Views
3K