# Tag Info

21

Yes, we should avoid shortened links. There is no need to use shortened links on our site - almost no post ever runs into the upper character limit for posts, and by default you should use links as hyperlinked clickable text [text](url) so the length of the URL is entirely irrelevant because it is not part of the visible text.

17

There are multiple reasons why it's better to link to abstract pages rather than directly to the PDF versions: Mobile users and users with slow internet connection prefer an abstract page over a PDF file. (Also, downloading PDFs can redirect to other applications instead of staying in-browser; this should be an explicit choice on the part of the reader.) ...

15

No. A non-peer reviewed reference is better than no reference. The reader can judge the legitimacy of a reference him/herself. In general, Phys.SE encourages answerers to back up claims with references. (Concerning self-citations, see this meta post. For link-only answers, see this meta post.)

11

Treating Wikipedia as authoritative (i.e. "Wikipedia say X and that settles it!") would be laughably silly, but Wikipedia is a fairly reliable source for all kinds of basic and widely available knowledge. Several uses of Wikkipedia that are (in my opinion, with my moderators hat taken off) completely appropriate: To support a argument or derivation only ...

10

No-one here is paid to answer your questions. In fact no-one here receives any reward for answering your questions other than the feeling of satisfaction that we've left the world of physics a slightly better place than we've found it. So if you expect to attract good answers to your questions you're going to have to convince the site members that taking ...

10

So I've read his answer many times now and I don't see how you reach the conclusion you reached here. It says: Posting links in comments is not banned, nor should it ever be banned. What should be banned is the repeated posting of a link to an alternative physics Q&A site (such as PO, PF, Quora, etc)1. It is the repetitive nature of the act that ...

10

The Physics SE is a community, and like all communities it needs everyone to pull together to keep it vibrant. The two most important things we expect of site members are: ask interesting and informed questions provide interesting and informed answers There are of course other supporting activities like processing the review queues, up and downvoting, ...

7

In general, we expect posts to be self contained so that all details needed are provided & users do not have to go off-site to find out what you're really questioning. Hence, you should provide a link for additional reference to the post, but it should not be a requirement to understand what it is you are looking at and/or questioning. Ben's comment ...

7

Questions and answers are followed by several links, one of which is "share." Clicking "share" opens a little modal window with the permalink in a text box and a button that lets you copy it to your clipboard. But you can also right-click (or long-tap) the "share" link and copy it to the clipboard using the context menu in your browser, same as other links. ...

7

Is it not acceptable to post links in comments? Or is it not acceptable to post links to the same site in comments? Posting links in comments is not banned, nor should it ever be banned. What should be banned is the repeated posting of a link to an alternative physics Q&A site (such as PO, PF, Quora, etc)1. It is the repetitive nature of the act that ...

6

As a general rule, if a comment contains a link to information that is directly pertinent to the OP's question, and to any future visitors interested in the post, I do not think it should be deleted. I do not think that repeated postings of such comments should be cause for concern, with the strong proviso that each and every comment must link to content ...

6

I certainly don't see anything wrong with links per se or repeatedly posting links to helpful webpages (e.g. wiki). I doubt that there's a blacklist of forbidden links, but you should not post links to offensive/inappropriate material or even irrelevant material. The aspect of your question regarding links to sites in which you hold a vested interest is ...

6

When you're answering a question about an observation like settling in fluid there are two parts to the answer. One is an explanation of the mathematical model used, and the second is the estimation of numerical values for constants used in your calculation. The mathetical model rarely needs citations, except possibly you're using a citation to skip the ...

6

There’s no difference for the person clicking the link, but there are minor differences for the person posting it, and for a hypothetical person who might read the URL but not click. The magic number that’s common in your two examples, 13855, is the database identifier of your post. When you visit a link of the first form, your browser is redirected to a ...

5

Educated guess: I think the answer here is that the current Astronomy.SE is the second iteration of that site. The first iteration failed at some stage in the Area51 process and Physics absorbed many of their questions. Later, apparently, a second Astronomy site was begun. I suppose it's possible that some post IDs got re-used. Note that the correct link, ...

5

Adding 4 spaces to the beginning of a line makes it a code block. Click 'edit' to see the four spaces before this line. It is useful on the programming sites (e.g., StackOverflow) where there is syntax highlighting enabled on those (something we don't have/need here). I've deleted those 4 spaces & the picture now appears.

4

Using my moderator superpowers I have removed the trailing slashes. There also seemed to be some invisible characters there. In any case, both links seem to work now.

4

Besides the points made in the answers by David Z & Emilio Pisanty, make sure to mention in the question lecturer, title, etc, of video, so the link can be recreated in case of link rot. minute in video, so the reader doesn't have to watch the entire video.

4

As I have expressed mainly by my edits on such posts, video-based questions can indeed be rescued to give, I think, fairly high-quality content. This is definitely time-consuming and should only be done if you think the end product will be worth it, but I think the end results can be quite good, such as these two, in their before-and-after shots: Rotor ...

4

Presumably$^1$ not, but it is most safe to use the permalink format suggested when clicking the share button. It sometimes makes a difference if the URL contains extra stuff (e.g. accidentally linking to a specific comment if the intent was to link to the question itself). -- $^1$ The word presumably because SE presumably will make sure that links work in ...

4

The answer here is "probably not." When you click the "add picture" button in the editor, your image gets sent to Imgur, who re-host the image. They give your image a unique line-noise name like AbCdE.jpg, generate medium- and small-sized versions with names like AbCdEm.jpg and AbCdEs.jpg, and then host and serve those images for the ...

4

A question link is converted to its question title in questions & answers but not in comments. (In chat it is possible to one-box a question link.)

4

So, my question is, should I go through the linked list and edit them so the links aren't explicit? It seems like it would be a good thing to do, but I want to make sure. Just to be clear, the change we're talking about is changing en.m.wikipedia.org to en.wikipedia.org, and similarly for other mobile-optimized URLs. That's a fine change to make but it ...

3

Since all TP.SE threads were migrated to Phys.SE, it is in principle possible to fix the link, which is hereby done.

3

It's not possible to change the text of an existing close reason. We'd have to create a whole new one, presumably with the same text except for the link URL. Personally, I don't think it's worth the trouble, although you're right that it would be best not to have a user ID in the URL. If we ever decide that the text of the close reason is somehow inadequate ...

3

Will I get a whole load of moderators moaning at me? Yes. Not just moderators, but the whole spectrum of site members (as Kyle Kanos mentioned in a comment). And it's not just moaning; questions which include pictures of something that could be typed out attract downvotes and close votes. They look unprofessional, and (as Qmechanic mentioned in a comment) ...

2

I will add that the site Bookmarklets for Stack Exchange contains several useful bookmarklets. The one called "Formatted link to a webpage" is useful exactly for situation like this - if you want quickly get a link to the current page formatted in the [text](url) format which is suitable both for comments and for posts on Stack Exchange. For example, if I ...

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