117,097 reputation
5183312
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 11 months
seen 1 hour 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.


Aug
6
comment Electrons and energy
I've linked a duplicate question. To summarise: the electrons don't radiate because they aren't accelerating. Neither the charge density nor the current density in an atom are changing with time.
Aug
6
answered How can a metal heated at 600° emit thermal photons at 4000°+?
Aug
6
comment Size of an elementary particle
possible duplicate of What is the mass density distribution of an electron?
Aug
6
answered Why can I move through air?
Aug
6
reviewed Looks OK Unitary transformation behind gauge transformation
Aug
6
comment Quantum uncertainty of a singularity: A Black Hole Problem
@AndresSalas: the answer of mine you refer to is a purely classical treatment, and the classical theory of general relativity does indeed predict singularities really form. Jerry's point is that we expect quantum theory to modify general relativity at very short distances, and we think the result will probably be that singularities do not form.
Aug
6
reviewed Reject Effective Refractive Index
Aug
6
comment Quantum Mechanics and Direction of time
possible duplicate of Is the collapse of the wave function inherently time asymmetric?
Aug
6
revised Quantum Mechanics and Direction of time
Typo
Aug
6
reviewed Approve Why can't we dope the intrinsic semiconductors with sixth or second group elements?
Aug
6
reviewed No Action Needed Quantum Mechanics and Direction of time
Aug
6
reviewed Leave Open Is it possible to shield a camera so as to record from the inside of a running microwave oven?
Aug
6
reviewed Leave Open Could symmetric molecular stretching cause a physical object to become amorphous?
Aug
6
awarded  Enlightened
Aug
6
awarded  Nice Answer
Aug
6
comment Leonard Susskind said that the small value of the cosmological constant could mean that the universe is much bigger than we thought. Why?
I watched the first half of the video, up to the point where Susskind got on to the anthropic explanation, and at no point does Susskind say what you claim. Can you give a precise time into the video that he says it?
Aug
6
comment How to approximate acceleration from a trajectory's coordinates?
What do you know about the environment? For example is this a ballistic trajectory or does the object have some form of propulsion?
Aug
6
answered What's the point of NASA's impossible space engine? Wouldn't a mirror work better?
Aug
6
comment Double-slit-experiment but with unobserved alternating opening of slits. Does an interference pattern still arise?
Just for clarification, does one slit remain closed for the whole time between emission of the electron and it hitting the detection screen?
Aug
6
comment How does exciting an electron's surrounding electromagnetic field cause 'electron excitation'?
Are you asking for a description of what happens when light causes an electron in an atom to change energy levels?