147,103 reputation
13250412
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 7 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.


Feb
8
comment What is static mass increase effect predicted by General relativity?
I wonder if this is just the GR version of the (rightly) reviled concept of relativistic mass i.e. gravitational time dilation means the momentum measured by a Schwarzschild observer will deviate from $mv$. The static mass increase would ascribe this to a change in $m$.
Feb
8
comment In what sense are photons emergent?
See the Wikipedia article on EW symmetry breaking. Above the EW transition neither the photon nor the Z exist. They appear at low energies due to mixing of two of bosons that exist before the EW symmetry is broken. I guess Wilczek's point is that the higher symmetry before the EW transition makes the physics simpler.
Feb
8
comment Scattering of slow neutrons
The picture is from this paper. It's a study of the nuclear energy levels of Uranium and Thorium. The picture probably came from the publications by this group on using the method of random matrices to understand excitations of nuclei. I have an idea this is also related to the distribution of zeros of the Zeta function.
Feb
8
comment If I am a light travel around Earth, what relativistic phenomenons do I have?
You might be interested in my answer to Can a ultracentrifuge be used to test general relativity? because I treat the case of relativistic motion in a circle.
Feb
8
comment Is the force experienced by a particle influenced by its distance to the focus of the force?
Welcome to Physics! Please note that Physics.StackExchange is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
Feb
8
comment Carrying light through bleached water: how does it work?
@Benjamin: the light hitting the end of the tube is just sunlight. You could make the end of the tube bigger, so it captures more sunlight, or I suppose you could use some arrangement of mirrors to concentrate sunlight on the end of the tube.
Feb
7
comment Application of Bernoulli's theorem
Welcome to Physics! Please note that Physics.StackExchange is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
Feb
7
comment So far, what has been proven about the definition of an observer?
possible duplicate of What is an observer in quantum mechanics?
Feb
7
comment Chopsticks in Water
Hi Bob. A quick Google will find lots of articles on this subject. If, after hving done some background reading, you have questions about the physics of refraction please post a new question.
Feb
7
comment Chopsticks in Water
I'm voting to close this question as off-topic because shows insufficient prior research
Feb
6
comment What is meant with the statement: “the universe in infinite”?
Also see this search for lots of other related questions.
Feb
6
comment What is meant with the statement: “the universe in infinite”?
possible duplicate of Is the universe finite or infinite?
Feb
6
comment What does quantum gravity look like at or beyond the Planck scale?
Stan, I've just noticed this question in the list of related questions. It has a couple of answers from big guns and would make interested reading. Actually it's sort of a duplicate in that it covers the same area.
Feb
6
comment What does quantum gravity look like at or beyond the Planck scale?
If I knew that I would be writing off to the Nobel committee. 't Hooft is (I assume) pointing out problems with the canonical quantisation of gravity. The implication is that GR is a large scale approximation to some more fundamental theory, which could for example be string theory or loop quantum gravity. But no universally accepted fundamental theory has yet emerged.
Feb
6
comment Understanding spectral line of hyperfine transition
Ah yes, thanks, good points!
Feb
5
comment What material can achieve the highest temperature before failing when being heated by electricity?
By produce the most heat before failing do you mean reach the highest temperature before failing?
Feb
5
comment Current flow through car struck by lightning
Mohd, I've suggested a better title for the question. If you don't like the change please feel free to revert it.
Feb
4
comment Conservation of energy and momentum in photoelectric effect
The initial electron scatters off phonons and other electrons within the metal, so tracking the momentum changes is basically impossible. I suppose the chunk of metal would change momentum to balance the momentum of the ejected electron.
Feb
4
comment Shine a beam of light horizontally, drop a stone from same height - would both hit the ground at the same time?
True, but the OP specifically requested we consider a land mass large enough for the curvature not to be apparent.
Feb
4
comment White Hole Formation
@AlbertEinsteinJnr. for a discussion of eternal black holes see the question Eternal Black Holes