Recent content by padremo

Surely no-one understands both (or either for that matter) :-)

This Richard Feynman lecture (In New Zealand, 1978) courtesy of the Vega Science Trust brilliantly explains the basics of QED, the relation between light and matter, and gives great insights into how light appears to behave to us. (There's 3 lectures, each lasting 1 and a half hours but they're...

Time doesn't exist on its own but is part of the spacetime package (time is space just viewed in a different perspective - what some people see as time others traveling at different speeds see as space). Therefore, if there was no time before the big bang, there can't have been space either...

My understanding is that there is no such thing as 'empty space'. Space is the collection of particles (and virtual particles) which are constantly being created and annihilated. in that sense, spacetime is quantised.

Has the discovery of dark matter and dark energy demolished our chances of finding a "theory of everything" any time soon - as I understand it string theorists say they are close(ish) to finding such a theory, but all our theories to date (including quantum mechanics and special relativity as...