101,161 reputation
4146259
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 7 months
seen 2 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.


Aug
28
comment Which of these two textbook equations of geodesic deviation is correct?
@JerrySchirmer: Lambourne uses +--- and MTW use -+++
Aug
28
comment Is the Big Bang defined as before or after Inflation?
@Jim: thanks :-) Sadly there is no extra privilege on reaching 100K, though you do get a freebie of your choice from the Stack Exchange shop.
Aug
28
comment What happens to light at sharp points?
@Nick: searchng for duplicates is very hit and miss. I only found the duplicate because I remembered it as being an interesting question and knew what to search for.
Aug
28
comment What happens to light at sharp points?
possible duplicate of Fate of light ray
Aug
28
comment Angular magnification of a two-lens system
Presumably related to Magnification of an astronomical telescope not in normal adjustment?
Aug
28
comment Why is acceleration constant in this example?
A downvote? Not that I'm fussed, but you need to tell me why you downvoted or I won't know how I can improve the answer.
Aug
28
comment Unsatisfactory explanation for the EMF measurement of a battery
@Just_a_fool: you'll have to draw a diagram of the three resistor circuit as I'm not sure what you're measuring in it. Incidentally CuriousOne is correct that there exist voltmeters that have effectively infinite resistance.
Aug
28
comment Taking photos without photons?
nature.com/nature/journal/v512/n7515/full/nature13586.html
Aug
28
comment Mass of magnet measured by weighing machine
This looks awfully like a homework question. Can you expand it to show what you've considered and precisely where you're stuck in calculating the answer?
Aug
27
comment A force opposing Gravity
@PeterHorvath: Thanks :-)
Aug
27
comment How to measure the energy consumption class of a home appliance?
@NikosM. Yes, because it allows you to calculate how much power the appliance consumes. The EU energy class depends on the power consumption, so once you've measured the power consumption of your appliance just look it up in the tables the EU publish to see which class it's in.
Aug
27
comment Do massive particles exchange Higgs bosons?
Related: Why isn't Higgs coupling considered a fifth fundamental force?
Aug
27
comment Correlation between Relativity and Quantum Mechanics
I'm not going to vote to close, since what seems obvious to us isn't necessarily obvious to newcomers. However the most basic of Google searches would have answered your question. You didn't really try to find out the answer yourself now did you?
Aug
27
comment Correlation between Relativity and Quantum Mechanics
Relativistic Quantum Mechanics or Quantum Field Theory if you want a description that includes non-conservation of particle number
Aug
27
comment How to measure the energy consumption class of a home appliance?
@BrandonEnright: so cancel and refund the bounty then leave it up to us to VTC. The question was open for three days before the bounty was created, so site users had plenty of time to VTC during that period. The fact they didn't suggests the community as a whole didn't want the question closed.
Aug
27
comment Photoelectric Effect - How are the electrons regained?
possible duplicate of What if all the electrons leave a metal?
Aug
27
comment What is Absorption Grating
@CuriousOne: that should be an answer. It's a brief answer but a perfectly valid one.
Aug
27
comment What can currently be deduced about empty hyperspace?
@CuriousOne: he's talking about a mathematical model, but then all theories are mathematical models. If Einstein hadn't imagined the pure fiction of riding alongside a light beam we might not have special relativity (I exaggerate for effect of course). I would be cautious about pouring scorn on even the wilder excesses of the theoreticians - apart from anything else one of them may one day be your head of department :-)
Aug
27
comment How to measure the energy consumption class of a home appliance?
I'm not especially amused to have a question closed by a moderator without any consultation. I think you should leave it up to us to vote to close if we want.
Aug
26
comment Hydrogen extraction efficiency of newish nano particle AA battery
@caseyr547: I've amended my answer to respond to your edits.