65,595 reputation
243167
bio website
location Greece
age 75
visits member for 4 years, 5 months
seen 5 hours ago

Retired experimental particle physicist.

The picture is a fayum . It looks like aunts and cousins of mine :).


7h
comment Is the Universe rotating?
the (0,0,0,t) is where we each of us is
7h
comment Is the Universe rotating?
Have a look at the current model of the universe, en.wikipedia.org/wiki/Big_Bang . Every point in the present universe is the center of the universe in this model and there is no three dimensional axis around which it could rotate
10h
comment Is helping others grasp difficult ideas, concepts or theories not considered giving an answer?
The way to progress on this site , i.e. to get enough reputation not to have difficulties, is two fold. a) you can ask questions about some physics subject or b) answer questions on physics subjects ( not just comment) or both.
12h
revised Which theory explains the path of a photon in Young's double-slit experiment?
expanded the answer
15h
answered Could it ever be possible to generate small gravitational waves?
15h
answered Which theory explains the path of a photon in Young's double-slit experiment?
17h
revised Do neutrinos have a half-life?
clarification after comments
18h
answered Do neutrinos have a half-life?
20h
answered Can higher level animals have lower entropy than the food they consume?
21h
awarded  string-theory
1d
awarded  Nice Answer
1d
answered Do neutrinos refract?
1d
comment How is the diameter of a nucleus measured?
also he/she is a new user and might sort of feel pressured to agree
1d
comment How is the diameter of a nucleus measured?
@KyleKanos I do not like the cavalier treatment a lot of experimental questions get here. It s very important that basic quantum mechanical questions are based on experimental evidence modeled by mathematics. Otherwise it is all science fiction. The other question was confused between classical diffraction and quantum mechanical diffraction. The answer does not clear that, nor does it give a real way of measuring nuclear sizes. That the questioner thought that his question was answered is not enough of an excuse to have a half answered question on the site.
1d
comment How is the diameter of a nucleus measured?
@Johnrennie I think this is a different question than the duplicate, which has not been answered anyway because it is asking about the analogy between quantum mechanical and classical waves scattering.
1d
answered How is the diameter of a nucleus measured?
2d
revised Wavelength of light too long to measure electron position in double-slit experiment?
had omitted electron field
Jul
4
revised Wavelength of light too long to measure electron position in double-slit experiment?
added 37 characters in body
Jul
4
answered Wavelength of light too long to measure electron position in double-slit experiment?
Jul
4
comment Can we know if “all” physical laws are discovered?
@innisfree I an talking about a candidate TOE, at the moment the only viable one I see, will be a particular string theory. I argue that TOEs are effective theories, i.e. mathematical models of nature, up until they are falsified. Our experience is that they end by being falsified, and we will not know until it is. Maybe if it is continually validated for 500 years one might consider it the last, but even so a probability will exist that it will be falsified for some part of phase space not explored experimentally till then.