Suppose the two entangled objects have traveled far apart when the measurement on A is made in a laboratory on earth. Say particle B is approaching the vicinity of the moon when a signal is received requesting that a measurement is made on B. How is the orientation of particle B with respect to...
This refers to the behaviour of cricket balls. Every cricketer in the world believes that a cricket ball "swings" more when the atmospheric conditions are cool and damp (as in the UK) as opposed to hot and dry (as in Australia). I have watched a bit of baseball and I have never heard...
I read in a popular science magazine in the UK that "recent" observations of the universe indicate that the number of galaxies in the the universe is actually so vast that Olbers paradox is still a paradox. The short article postulated that they had solved the paradox by proving that light from...
I rather garbled my sentence. I meant to say that of the potentially infinite number of universes of the many-world interpretation of QM the one in which we exist where Amazon employs 7000 people in the UK (mostly on the minimum wage) they pay no UK tax.
We often hear about Faraday in the UK (on the history or development of science) but I never heard of his experiment showing the effect of magnetismon the polarisation of light. 1845! Obviously I must have nodded off in during the lecture on the Faraday effect at school or university. I once...
To be honest I don't feel much wiser - the Quantum Harmonic Oscillator went way over my head. I suppose I am asking the impossible - an explanation of QM without maths. I have looked at the array of popular books on QM that I have and found that they make no mention of QFT or a passing reference...
I hesitate to ask this but what are electric and magnetic fields? We are told that the electromagnetic force is carried by the photon (which consists of oscillating electric and magnetic fields) but the photon does not cause (?) or interact with external magnetic and electic fields. Presumably...
If you get two sheets of A4 (letter) sized paper and hold them parallel with a gap between them and blow into the gap the sheets are sucked together, not blown apart. That's my practical demo or where lift can come from just by the flow of air
I just read a description of the experiment reported several months ago at the Australian national University where they isolated a SINGLE helium atom (really? I am a simple chemical engineer not a physicist) and performed two measurements on it - is it a wave or particle? All as Niels told us...
I have always found the Newton's Cradle that my daughter bought for me fascinating. With the steel balls as identical as possible then the analysis of the process is simple. Both the momentum and kinetic energy are conserved (assuming negligible losses) on collision. The only way(?) this can...