132,103 reputation
8221365
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 3 months
seen 4 hours 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.


Jan
6
reviewed Close Different sized pneumatic Pistons
Jan
6
comment Measuring nucleons using electron beams
@Nogueira: I'm not sure I've grasped what you're asking. A proton is an exceedingly complicated structure full of dozens (hundreds?) of virtual quarks and anti-quarks (three more quarks than anti-quarks). The electron can only resolve this structure when its wavelength is short enough i.e. its energy is high enough.
Jan
5
comment The two-body problem - planets orbiting each other
@DavidHammen: for two objects of similar masses?
Jan
5
comment Virtual Photon transmission speed of a Static Electric Field?
Virtual photons can travel faster than light
Jan
5
reviewed Delete Do centripetal and reactive centrifugal forces cancel each other out?
Jan
5
reviewed No Action Needed Ferro and Ferri magnetism
Jan
5
comment An old mechanic paradox
Hmm, I note also this question. Seems a bit of a coincidence.
Jan
5
answered The two-body problem - planets orbiting each other
Jan
5
comment Expansion of the Universe: is new space(time?) being created or does it just get stretched?
@SuperCiocia: I guess that depends on what you mean by physical entity, but my view is that no they are not. But I should emphasise that this is a purely philosophical viewpoint and irrelevant to the gory business of using GR to calculate things about the real world.
Jan
5
answered Ohms Law Question?
Jan
5
reviewed Reopen How to calculate $3\otimes 3$ and $3\otimes 3\otimes 3$ in $SU(3)$?
Jan
5
reviewed Reject What is antimatter?
Jan
5
reviewed No Action Needed End current without touching wire
Jan
5
reviewed No Action Needed Why is the speed of light in vacuum constant?
Jan
5
reviewed Leave Open Kinetic energy (KE) in atomic orbital
Jan
5
reviewed Leave Open What would an relativistically expanding sphere look like for an external observer?
Jan
5
comment What would an relativistically expanding sphere look like for an external observer?
Your questions seems to boil down to what your reflection looks like in a mirror if it's moving at relativistic speed. Is that a fair comment? If so, I'm sure I've seen questions like that on this site, or if not a Google should quickly find some relevant articles.
Jan
5
reviewed Leave Open More Vector Product Possibilities?
Jan
4
comment How did we come to know that electrons actually 'move' in an atom?
@Sofia: yes, that's exactly what I meant. You describe it very well :-)
Jan
4
reviewed Leave Open Raising and Lowering indices of tensor