Recent content by jeebs

lol, that might be what I like about them actually, they've got a weird texture. I hold them in my mouth for ages until they melt.

I know someone from russia who goes home every so often and brings back these incredible chocolates, no idea what they are, but the world's best chocolates are definitely russian.

well I wouldn't quite say that ALL knowledge stems from pure reason, there's certainly something to be said for experience, but even so, you've got to draw the line somewhere - there's no getting away from the things that are said in the bible. I mean, is it really such an extreme view if a...

Unsure if this is the right section to post this in, but anyway... There is a professor in my university's physics department that I have great respect for, as he is an obviously intelligent, likeable man and an accomplished physicist. However, I recently found out that he is also a catholic...

I wasn't sure if this is the right section to put this, but I didn't notice an obvious alternative. Anyway, I've been wondering about the mind. We're made out of loads of little bits of ordinary, inanimate matter. Somehow in this universe it is possible to take some particles and carefully...

I'm trying to understand a bit about CP violation and how it relates to neutrino oscillation. I have a book, "Introduction to High Energy Physics" (Donald Perkins) which says that the probability of observing no change in the flavour of a neutrino is equal to that of an antineutrino of the same...

hmmm, that's a bold claim.

I graduated a four year physics course at a quite highly rated British university in 2011, and am now 24 years old. I managed a to graduate with a 1st and am now into the first year of my PhD, but I sometimes question if I'm really that competent/knowledgeable. I feel as though I have forgotten...

This isn't strictly a homework problem but anyway... I'm reading through a QFT textbook that is using index notation, and sometimes a new index symbol will be introduced during some mathematics and it always throws me off. I'll give a simple example, take the Minkowski metric: g^{\mu\nu} =...

The first thing I remember hearing about in QM was the time-independent 1-D Schrödinger equation, Hψ = (\frac{-\hbar^2}{2m}\frac{d^2}{dx^2} + V)ψ(x) = Eψ(x) . This is an eigenvalue equation, the Hamiltonian operator H operating on the energy eigenstate ψ to produce the product of the energy...

I'm trying to do the following problem: ie. I'm trying to use the Feynman rules for momentum space to write down the mathematical expression that the diagram is supposed to represent. However, I don't feel very confident in what I've managed so far. Now as I understand it, these diagrams...

I'll have to take your word on that because this means very little to me...

hmmm, this will teach me to take what I read on random internet sites seriously without checking for proper peer reviewed papers. There are so many sites out there that paint this idea of quantized blocks of space as fact.

ah, so I actually am mistaken?

If I'm not mistaken, it is thought that space is divided up into quantized little indivisible chunks, the size of which is called the Planck length. Also, the space of the universe is thought to be expanding. We could have 2 objects stationary relative to one another at some time t_0, then...