130,059 reputation
8215355
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 2 months
seen 33 mins ago

Semi retired old time computer nerd who started programming on a Commodore Pet.

Since I'm also active in the Physics forum I should add that I started as a theoretical chemist, moved into solid state photochemistry and finally worked in industry as a colloid scientist. I only became a full time computer nerd in 1997.


2d
reviewed No Action Needed Kirchoffs voltage law
2d
comment Ejected Photoelectrons
Isn't this just Compton scattering? For a 13.6keV photon and forward scattering I get about 2.6% of the photon energy transferred to the electron, which is way lower than relativistic energies.
2d
reviewed No Action Needed QM: Why is there a minus sign on the Energy operator when using complex conjugate?
2d
reviewed Close Quantum GMT and no-communication theorem
2d
reviewed Leave Open Need definition of symmetric and antisymmetric tensor representations of a Lie algebra
2d
comment Why doesn't the light get out?
John, I don't really get what you're asking. If you turn on your torch at the event horizon then the light doesn't go anywhere but you fall inwards away from it at the speed of light. Does that help?
2d
comment Why is the Specific Heat of Helium 36 times greater than Xenon?
In an ideal gas atoms have three degrees of freedom, the $x$, $y$ and $z$ directions, and each DOF gets about $\tfrac{1}{2}kT$ of energy. So the total internal energy is $\tfrac{3}{2}kT$ times the number of atoms.
2d
reviewed Leave Closed how does gravity exist?explain in detail about the factors responsible for it?
2d
reviewed Leave Open Location of singularity in moving black hole
2d
reviewed Close Pressure change with adiabatic compression problem
Mar
25
comment Why does the Higgs field have less energy when it's non-zero than when it's zero?
@innisfree: what I would guess the OP wants to know is why the Higgs potential is the shape it is. Whether that has an answer I'm not sure.
Mar
25
comment Why does the Higgs field have less energy when it's non-zero than when it's zero?
Yes, agreed.${}{}{}$
Mar
25
revised Why does the Higgs field have less energy when it's non-zero than when it's zero?
Respond to comment
Mar
25
answered Sign convention for the Minkowski metric $\eta_{\mu\nu}$
Mar
25
answered Why does the Higgs field have less energy when it's non-zero than when it's zero?
Mar
25
comment Why does the Higgs field have less energy when it's non-zero than when it's zero?
I don't think this answers the question because it doesn't say why the VEV is not zero. The VEVs of all the other known bosonic fields are zero, so what is it about the Higgs that mkes it different?
Mar
25
reviewed Close Laptop Protection from Wood will leave a negative current?
Mar
25
comment Why doesn't the light get out?
You might also want to have look at If you shoot a light beam behind the event horizon of a black hole, what happens to the light? and for a more technical discussion Would the inside of a black hole be like a giant mirror?.
Mar
25
comment Why doesn't the light get out?
I thinm this is a duplicate of Speed of light in a gravitational field?. I won't flag it as such because that would immediately close your question, but I thnk you should have a read through my answer to the question I've linked.
Mar
25
reviewed Leave Closed Fusion - A List of Experimentally Achieved Beta Numbers in Magnetic Confinement