77,841 reputation
178167
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 3 months
seen 7 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.


2h
reviewed Reject suggested edit on Does centrifugal force exist?
2h
reviewed Approve suggested edit on could the principle of sufficient reason adequately describe causation?
2h
comment How does conservation work in wormholes?
@Juris: yes. Remember that to a freely falling observer the space immediately around you looks flat (just as the surface of the Earth near you looks flat). Look a bit farther away and you can measure the curvature, but it's just curvature. It's only when you look far enough to see the global structure that you could tell you were in a wormhole.
3h
answered How does conservation work in wormholes?
4h
asked Building a wormhole
4h
answered How would you connect a destination to a wormhole from your starting point to travel through it?
4h
answered Photons emitted at the event horizon?
5h
reviewed No Action Needed If you shoot a light beam behind the event horizon of a black hole, what happens to the light?
5h
reviewed Leave Open Will it start rolling?
6h
comment Why are people weightless whilst in orbit around the Earth? ISS? Satellites?
possible duplicate of Weightlessness for astronauts
6h
answered Tokamaks and the reason they are not efficient
6h
comment How many years would it take to travel 490 light-years?
I'm not sure this is really homework, or even homework-like. I can't find a question/answer on the site that does the calculation for steady acceleration. While the calculation is simple for us nerds I would have guessed it's hard for all but undergrads and above. Maybe we need a reference question/answer that we can link to for similar future questions.
6h
comment How many years would it take to travel 490 light-years?
The elapsed time for the occupants of the spaceship can be less than 490 years.
6h
comment Could compression of electromagnetic waves cause red shift
Can you expand on supernovae judged to be closer to us, based on luminescence, appear to be moving away from us faster than distant supernovae judging by red shift. Maybe provide a reference?
6h
answered Could compression of electromagnetic waves cause red shift
18h
comment Why do we orbit around the sun instead of one the other stars?
How do you know an alien student sitting in a classroom orbiting another star isn't asking itself exactly the same question?
18h
revised Is it probable that planets will stop orbiting in ellipses?
Correct typo
19h
reviewed Approve suggested edit on Does centrifugal force exist?
19h
reviewed No Action Needed In interferometry, what is the origin of the name “Airy function”?
19h
comment Can we physically “time travel” to the future?
@Bombyxmori: so are you proposing a discontinuous world line? If so, your question is science fiction not physics. If not then the time travel is simply the special relativity sense that you have already ruled out (and which, incidentally, does not violate any conservation laws).