But not without an arc (ionization), which was the whole point in the first place.
You apparently can't even follow your own line of reasoning (not surprising, since no once else can follow it either).
Bob M.
I think "Radium is a clueless troll" would sum it all up quite nicely.
Bob M.
That isn't a URL, its a link to a USENET message.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
Whatever it is, it's not doing me much good. When I click on it, my browser tries to e-mail someone at 4ax.com, and when I paste it into the URL field I'm told that 4ax.com is not found.
Clueless, maybe. But I think his questions are genuine, and I will continue to assume they are until he proves me wrong to my satisfaction.
Gee. This radium guy is superb and manufacturing entropy.
Sorry. I was pointing out to another poster that DC current can flow through air. That poster claimed that only AC can travel through air.
Is it possible for "arc" to have ionization thats small enough that it does not glow?
If the extent if ionization is enough, then the arc becomes visible. Below that, it is invisible but can it make sound?
Can diaphragm-less loudspeaker use low-level ionization to produce sound w/out lighting the air?
Plese keep basic electronic questions out of alt.sci.physics.acoustics..
Those are "off-topic" for acoustics.
Angelo Campanella
Not without the very ionisation you're seeking to avoid.
Correct.
Small enough perhaps not to notice visually in normal lighting. But it'll be there. Try turning the lights out !
Graham
In that case, AC current also requires ionization to flow through air. Unless, of course, you're talking about electromagetic waves resulting from the AC, but thats totally different.
No. I am talking about a big fat "arc" whose power is low enough that it does not light up at all. Can this arc still produce intelligible sound?
It has to be a clickable link, and exist on your news server for it to work. Apparently, its a link to this thread, and a message posted by Alan B on Wed 8:05 PM
He also left the off the link.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
On Thu, 17 Aug 2006 08:27:30 -0500, in message , Greg Hansen scribed:
Well, first, it's not an URL. Second, why doesn't broadcast radio and TV, etc., "really matter?"
On Fri, 18 Aug 2006 00:20:38 GMT, in message , "Michael A. Terrell" scribed:
Oh blast. Are the brackets necessary? I had no idea, sorry.
*Current* itself would of course. Power is another matter.
Not different at all. You have a naive simplisitic view of electricity. Faraday was smarter ! I suggest you read his work.
The light produced would simply be proportional to power. There is no threshold involved.
If the arc / ionisation is of low power, so will the sound be.
Graham
A bit of research will prove beyond a doubt that he is indeed a troll.
Look. For once, Radium actually has a point.
It is possible for DC current to flow through air without producing a spark. I have done it myself.
Take a variable (~30kV) DC high-voltage source. The one I used was valve- powered, by the way! Take two needles and clamp them so that each point points to the other needle's point, i.e. they're pointing at each other. Set the points 1cm apart. Obviously, the needles will not be electrically connected. Each needle is connected to one output of the high voltage generator. Start the generator at a low voltage. Crank it up, and before it does spark (experiment to find the voltage at which it does, if you like (if you damage your generator if/when it sparks, that's your problem, not mine)), there will be an "ion wind" between the needles. Sometimes you can even hear it, or see bits of dust in the air being blown around. Current is most definitely flowing, yet there is no spark. There is ionisation, but no spark as such. In the dark, you will likely see a blue glow at the needles' points. But it is still not a spark, in that it does connect the needle points. Turn the voltage down a little, and stick a candle flame between the electrodes.
Have fun. Don't kill yourselves.
Martin
Disclaimer: This in no way endorses Radium's other stoopid questions.
-- M.A.Poyser Manchester, U.K. http://www.livejournal.com/userinfo.bml?user=fleetie
They might be genuine, but his followups imply that he is unwilling to learn anything and is unable to have any kind of meaningful discourse about technology. All attempts to point out his misconceptions are for naught. Are you really going to spend your time trying to explain things to him?
Mark
Only if the message id works. Most of the time it doesn't. You have to be on the same news server for it to work. If I see one that is from Earthlink, I can open it. Nothing else.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
"Eeyore" wrote in message news: snipped-for-privacy@REMOVETHIS.hotmail.com...
Let's face it, Pee-Wee Herman was smarter than Radium. Radium reading Pee-Wee's collected works on the subject would no doubt be of nearly equal benefit.
Bob M.
A matter of semantics. What do you consider to be the distinguishing feature of a "spark," if not the glow? What you have in the above is a "spark" or "arc" - it's just one that is too feeble to result in a readily-visible ionization trail.
Bob M.
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