140,797 reputation
9242395
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 5 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.


1d
reviewed Leave Open On the Lorentz Group representation
1d
reviewed Leave Open Fourier transformation and commutators
1d
reviewed Leave Open Proving the speed of light to be an invariant and the “ultimate” speed limit using Minkowski diagrams
1d
reviewed Leave Open What happens to sound at speeds greater than mach 1?
1d
reviewed Leave Open Could electromagnetic charge curve something like spacetime in analogy with general relativity?
1d
reviewed Close Is there a physical interpretation of the alternating property?
1d
comment Is there any evidence against the Cosmological Principle?
Hi Lance. A good answer would in effect be a review article and I think that makes the question too broad. I found an interesting paper on the Arxiv that includes a literature survey. This would be a good start. A brief answer is that there is some tantalising evidence that the universe may not be as homogeneous and isotropic as we have assumed, but nothing concrete yet.
2d
reviewed No Action Needed Can anyone explain me how time can bend according to Einstein in simple way?
2d
reviewed No Action Needed How to calculate the inertia tensors of an irregular polygonal right prism?
2d
reviewed Leave Open Cosmological constants
2d
comment Doesn't dating the universe violate the concept of spacetime's inseparability?
@JimsBond: actually I've just spotted that the Wikipedia article I linked uses the term "comoving time". So yar boo sucks!!! :-)
2d
comment 't Hooft–Polyakov and Dirac monopoles, instantons and solitons
There are loads of articles on these subjects out there in Googlespace. I think you should read around the subjects a bit before posting here. If there are some aspects that you don't understand please come back to us and post a question explaining what you do understand and what you don't.
2d
comment Throwing the object around the Earth
Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
answered Period to calculate the universal gravitational constant
2d
comment Doesn't dating the universe violate the concept of spacetime's inseparability?
Well, it's the time component of the comoving coordinates. Is abbreviating this to comoving time such a sin? You are of course correct that it is also the proper time of a comoving observer.
2d
revised Is this an inertial frame of reference in relativistic context?
Oops
2d
comment Are magnetic orbits possible?
The magnetic fields of the Sun and Earth have a negligably small effect on their mutual orbit. The orbit is dominated by gravitational forces.
2d
reviewed Reviewed entaglement experiments in laboratories for atom and photons-how to?
2d
reviewed Close Inhomogeneous Maxwell's equations in CGS units
2d
reviewed Close Question about Elon Musk's Hyperloop Suspension