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user54412

2:01 AM

Comment on question (v2): I would imagine that you intend for the $\dot y$ in your lagrangian to be an $\dot x$? — joshphysics 12 mins ago

user54412

I think joshphysics is becoming the next Qmechanic

David Z

5:28 AM

Q: What did Skobeltsyn publish about the possible existence of the positron?

I've read across several sources that before C. Anderson discovered the positron in 1933 there were evidence of its existence pointed out previously by C.-Y. Chao and D. Skobeltsyn. After some rearch I found that a reference for the work of Chao here. I wasn't able tough to find Skobeltsyn's wor...

Good example of appropriate use of the specific-reference tag

Anyway, in other matters: I'm thinking of renaming cross-section to scattering-cross-section. Any objections? Thoughts?

Danu

6:28 AM

@DavidZ good idea

3 hours later…

glance

9:26 AM

hi! I'm often wondering: wth does the "v" in things like Comment on question (v2) stand for? And how do you count the questions? by number of question marks?

David Z

10:00 AM

@glance "version", because the complete revision history of each question is saved and you can look at old versions by clicking a link at the bottom

I'm not sure what you're referring to with "how do you count the questions"

glance

oooh now it all makes sense! I thought it was a way to count the actual questions in a question (which infact seemed strange). Thanks for the clarification

David Z

cool, glad to help

In other news:

Q: Can someone explain Fizeau's method of measuring the speed of light?

While searching for different methods of speed of light measurement, I came across one of the methods of Fizeau, discussed below, which i cannot fully understand. In short,in Fizeau’s apparatus, a beam of light was shone between the teeth of a rapidly rotating toothed wheel, so the “lantern” was...