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location Greece
age 74
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Retired experimental particle physicist.

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


Jul
16
comment If dark energy is accelerating the expansion of the universe, why can't I feel it?
The acceleration comes from all around each point, not from one direction as when you are in a plane. It is weak enough so that it does not pull clusters apart or galaxies or planets or atoms.
Jul
16
answered If dark energy is accelerating the expansion of the universe, why can't I feel it?
Jul
15
comment How is the theory of partial coherent light related to quantum-mechanics?
Spectral lines are measurement in my book, a measurement is a numerical value attached to an observation. Quantum mechanics has nothing to do with the definition of measurement. I see you consider a measurement "strange" because it is not explainable by solutions of classical equations. I suppose that by "measurement processes" you are wrapping around the probabilistic nature of each measurement? My answer to "how much can be explained" would be : none; otherwise quantum mechanics would not have been necessary. The crux is the probability postulate, the Born rule.
Jul
15
revised How is the theory of partial coherent light related to quantum-mechanics?
added 1291 characters in body
Jul
15
comment Does the Higgs boson give mass to ALL other particles?
@Michael It is amusing but the mexican hat is part of the logo of physics.stackexchange. Have a look at the top left of PHYSICS
Jul
15
revised Does the Higgs boson give mass to ALL other particles?
elucidation necessary because of edit in question
Jul
15
comment Does the Higgs boson give mass to ALL other particles?
@Michael sorry, there has been a drastic edit to the question I did not notice. there was an extract in the previous edition that did mention the hat. People should not make drastic changes to the content of the question.
Jul
15
comment Does the Higgs boson give mass to ALL other particles?
@Michael look at the wiki link for higgs, the mexican hat. It is not mentioned in this question, so you must be confusing this with another answer
Jul
15
revised Does the Higgs boson give mass to ALL other particles?
expansion after comments
Jul
15
comment Does the Higgs boson give mass to ALL other particles?
@MikeDunlavey I will edit to make this clear
Jul
14
answered Does the Higgs boson give mass to ALL other particles?
Jul
14
revised Regarding luminosity monitor of particle collider
completed answer
Jul
14
answered Regarding luminosity monitor of particle collider
Jul
13
answered How is the theory of partial coherent light related to quantum-mechanics?
Jul
13
comment Is the principle of Conservation of Energy empirically verifiable?
This expansion of the concept of energy has been going on continuously as physics theories progress. Special relativity was necessary to explain nuclear reactions within the content of energy conservation,
Jul
13
revised Would an antimatter beam create multiple matter-antimatter explosions?
added link
Jul
13
answered Is there any example of an inelastic collision where final kinetic energy of the system is greater than its initial kinetic energy?
Jul
13
comment Atomic physics - electron density
@celtschk you have a comment asking you to make your comment an asnwer. Here are the pz orbitals too .chemistry.tutorcircle.com/inorganic-chemistry/…
Jul
13
comment Is there any example of an inelastic collision where final kinetic energy of the system is greater than its initial kinetic energy?
an explosion too ends up with lots of kinetic energy.
Jul
13
comment Is there any example of an inelastic collision where final kinetic energy of the system is greater than its initial kinetic energy?
all the time in particle physics. gross example antiproton proton inelastic scattering.