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Comments for Asymptotia





Last Build Date: Thu, 19 Apr 2018 15:53:03 +0000

 



Comment on North Carolina Science Fair! by Mark Peifer

Thu, 19 Apr 2018 15:53:03 +0000

Back from the Fly Meeting and finally have a chance to thank you for your visit!! Each event was great and it was really fun to finally meet you.



Comment on An Exhibit! by Clifford

Thu, 08 Mar 2018 20:22:12 +0000

Hi Holly! Thank you very much for your kind comment. I’m very glad to hear you enjoyed the book. For the speech bubbles, I was very careful to follow standard conventions on how to read them. So I think in all cases if you stick to the conventions, it should work out. Comics have a particular set of conventions for how you read them (which you may or may not know, I don’t know), and I’m using those. And if it sometimes doesn’t work, that’s OK, you can just read that panel again. Just like sometimes in a real conversation there can be a bit of confusion but you just carry-on enjoying the conversation anyway. BUT there are some places where I deliberately mess with the convention and intentionally introduce confusion into the order in which you’re supposed to read the speech. Perhaps it is one of those places that you got confused. I think there are two or three such instances and it is in the middle of discussing the breakdown of space and time where I deliberately mess with the order of things because I am messing with the fabric of space and time of the comics page at the same time. In other words, sometimesI am explicitly play with the conventions of the comics form in order to resonate with the physics being discussed, in this case the breakdown of space and time. I did not want to over explain it but you can find it in the notes in a couple of places at the end of the chapters. Cheers! --cvj



Comment on An Exhibit! by Holly Hunter

Thu, 08 Mar 2018 19:46:51 +0000

Sorry for the typo.



Comment on An Exhibit! by Holly Hunter

Thu, 08 Mar 2018 19:46:02 +0000

I love The Dialogues. Bravo! But...I have a suggestion, to. I find it a bit distracting, navigating each page's dialogue bubbles. Sometimes I move in the wrong direction. Perhaps it would help to have tiny little numbers at the top or bottom of each one, to help those of us who are "directionally-challenged"? Thanks for considering. Look forward to more of your books.



Comment on Conversation Piece by Clifford

Thu, 22 Feb 2018 14:27:44 +0000

Thanks! -cvj



Comment on Conversation Piece by Alisa

Wed, 21 Feb 2018 22:06:04 +0000

I’m sooo in love with you. Thank you for existing during my life time.



Comment on Conversation Piece by Clifford

Thu, 01 Feb 2018 03:44:14 +0000

Hi, In principle these seem like reasonable questions, and we're all glad people ask them. Thanks! Sometimes such key questions can be difficult to answer because they could mean lots of different things. Sp part of the problem might be that many of your questions are not really well-defined, so answering them can only result in further vagueness, so most will likely decline to answer them. Also, it might not be clear what level you're asking them at: At least at face value the answers you seek are in very many standard treatments available in several books and other sources, so since you're saying you don't find those adequate, I imagine that means you're looking for answers at a level that really doesn't connect to physics as we understand it. Let me take a run at it. (I will not be able to engage in an endless series of followup questions, I'm afraid.) 1. I don't really understand the question. I assume you are not asking why the speed of light is what it is as opposed to some other value. (On the one hand that's just an issue of units of measurement, and at another level it is to do with light being a wave in electromagnetism and there is a unique way (in vacuum) of making a self-sustaining propagating oscillating solution of the E and B fields (a wave), corresponding to the unique speed. So maybe you're asking why it is finite. The "why" part is hard, so maybe it is easier to say that we've learned from experience that the universe does not seem to allow instantaneous influences. Things take a while to move from one place to another. Makes for a more interesting (and easier to make sense of) universe, so I'm grateful for that. I 2. There are many kinds of charge, depending upon the force involved. For electromagnetism there is electric charge, that comes in two signs. In principle there's also magnetic charge coming in two signs, but fundamental isolated magnetic sources have not been observed. If you move to the nuclear forces, they have their charges too. There are many great books about particle physics talking about this, so I'll refer you to them. 3. Classically, it's the dynamics of the geometry of spacetime. This is beautifully encapsulated in Einstein's General Relativity. That understanding certainly does not help in explaining quantum gravity. It actually is at the heart of why it is hard to get the quantum story right: All known quantum descriptions of nature are from quantising the dynamics of something that moves while treating spacetime as a backdrop. Quantizing gravity (fully) requires also quantising the backdrop. If you'll forgive the plug: I talk about some of these issues in my book The Dialogues. Also, there, you can find lots of suggestions for further reading. Best Wishes, -cvj



Comment on Conversation Piece by Nick Clarke

Wed, 31 Jan 2018 16:15:59 +0000

Hello Professor Johnson, I applaud your efforts to popularize science. I have some questions for which I cannot find adequate answers. I have written to t'Hooft, Suskind, and others and no one can give a real answer. 1. What inhibits the speed of light? 2. What is the source of charge? Are there only two types of charge or are there others? 3. What is gravity, really? A condition of space, maybe? This might explain quantum gravity. I have been working on these questions for for many years now and do have some thoughts that I would like to share and discuss. I would dearly love to have a chat with you. If you have regular office hours, may I make an appointment? Sincerely, Nick Clarke 949.981.3472



Comment on Nice to be Back… by Clifford

Wed, 17 Jan 2018 05:34:31 +0000

I don’t know of any particular advanced text any of us use. Depends on the advanced topic.



Comment on Nice to be Back… by Clifford

Wed, 17 Jan 2018 05:30:03 +0000

RSS feed, or follow on twitter for updates of new posts.



Comment on Nice to be Back… by Franz Dullaart

Wed, 17 Jan 2018 04:21:20 +0000

https://vuurklip.wordpress.com/2017/12/27/elementary-particles-on-the-pavement/ It would be nice to be able to subscribe to your blog!



Comment on Nice to be Back… by Stephanie Taylor

Fri, 12 Jan 2018 20:44:11 +0000

As a professional artist, I'm in complete admiration of your approach, process, your commitment to each and every drawing. And, the challenge of figuring out how to communicate such profound concepts, whether you know how to draw or not. Bravo from California.



Comment on Nice to be Back… by Rico Suave

Fri, 12 Jan 2018 14:52:51 +0000

Do you or anyone else there teach an advanced QFT course? What book is used for that? What about a particle physics course/Standard Model course? What book is used for that, if so? Thanks!



Comment on Nice to be Back… by Clifford

Fri, 12 Jan 2018 07:06:24 +0000

I’ll probably use Zee’s book as the primary text. Sorry, course websites are on blackboard here... and I will put notes out for this one. There are many excellent notes out there, and some great books, like Zee. Cheers, -cvj



Comment on Nice to be Back… by Rico Suave

Fri, 12 Jan 2018 06:32:01 +0000

Which textbook(s) will you be using? Also, any chance that your notes will be made available online? Oh, and is the course website accessible to non-students?