User talk:Constant314/Archive 9

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From an old conversation on Electric fields

Hey, I stumbled across this trying to find something else. Excuse me for the late reply lol.

In integration rectangles are often used, and we don't stop using rectangles at the limit of $f(x)$ going to zero even if it is only a good approximation for area when $f(x)>>dx$ outside of which you maybe expecting the triangle-ish shapes to lead to inaccuracies. It only matters if the upper and lower limit converge to the same value. I won't try to rigorously talk about upper and lower limits in the context of the linked paper but I thought I had to comment since I feel like you left an interesting comment and took your time to go through my linked article. ^^ EditingPencil (talk) 20:31, 3 February 2024 (UTC)

Waiting period

I'm going to wait a while and then make the same improvements to the EM field article again. When I do, you won't revert them. Holographer1 (talk) 19:47, 9 February 2024 (UTC)

My apologies on reverting EM radiation. I had no issue with those edits. I was on the wrong article. Constant314 (talk) 19:49, 9 February 2024 (UTC)

The discuss of physical vs mathematical needs reliable sources and a talk page consensus. When you change a stable article and get reverted, the onus is on you to build a consensus.

Apologize for my reverts on EM radiation. I was on the wrong article. Constant314 (talk) 19:52, 9 February 2024 (UTC)

your revert of my edit in article characteristic impedance

Regarding your revert https://en.wikipedia.org/w/index.php?title=Characteristic_impedance&oldid=prev&diff=1217577555 : I follow up on your revert comment "Already clarified in the same sentence. I'll be glad to help if you think I missed your intention.".

So the statement in the article as-is is the following:

> The characteristic impedance or surge impedance (usually written Z₀) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.

So I assue "already clarified in the same sentence" refers to "a wave travelling in one direction in the absence of reflections in the other directions".

This statement does not make it clear to me what a "single wave" is. The term "single wave" is still vague.

Exemplary suggestive questions that come here up are:

• is a single wave a single period?
• is a single wave a single frequency?
• is it a "packet of energy" / impulse?
• What makes a signal/wave a "travelling wave"?

Thank you very much with providing more insights, e.g. by further extending the explanation, by linking to a definite article, or by creating such article for "single wave". Abdull (talk) 09:35, 9 April 2024 (UTC)

I see what you mean. I believe the intent of "single wave" means no wave traveling in the opposite direction. Constant314 (talk) 14:59, 9 April 2024 (UTC)

apology

I seemed to have welcomed someone at the same time as you - double welcome is not that common, it was accidental - I keep thinking there is lag somewhere to not have seen yours already there - feel free to delete mine if you feel inclined, otherwise... JarrahTree 02:12, 27 April 2024 (UTC)

Nothing wrong with a double welcome. I am sure that there are lags. Nice to meet you. Constant314 (talk) 02:16, 27 April 2024 (UTC)

Reminder to vote now to select members of the first U4C

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Illustrations on skin effect

Hello. You recently put a tag requesting clarification on the Skin effect article. In your edit summary you said that you could provide illustrations if contacted. I am not terribly skilled in graphics programs, so I was wondering if you could produce an illustration similar to the one on the right. Here the $\Delta a$ length is perpendicular to to the long axis of the wire and the $\ell$ length is parallel.

Let me know if the description is unclear. Thanks, XabqEfdg (talk) 01:39, 7 May 2024 (UTC)

That shows me what you want. I am not that good either, but this one looks pretty simple. Constant314 (talk) 02:21, 7 May 2024 (UTC)

Wire cross section

How is this? Constant314 (talk) 04:25, 7 May 2024 (UTC)

Sorry for the delay in replying. That is excellent! Thank you for making that.

May I ask what used to produce such an image? XabqEfdg (talk) 14:43, 7 May 2024 (UTC)

Thank you for the compliment. I use Microsoft Visio. I do not recommend it, but I have it and I am used to making it do what I want it to do. It is a 2D drawing program. It is tedious to 3D depictions. But I am retired and do not mind. I have posted the image. If you want different symbols or fonts or features, let me know. Constant314 (talk) 15:39, 7 May 2024 (UTC)