61,532 reputation
236147
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location Greece
age 74
visits member for 4 years, 2 months
seen 7 hours ago

Retired experimental particle physicist.

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


7h
comment Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
@innisfree the question is not about energy conservation in general relativity but about gravitational red shift, where it is OK
7h
revised Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
clarification on energy conservation
7h
revised Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
deleted 61 characters in body
7h
answered Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
8h
answered Discovery of spin-3 particle at LHCb
19h
awarded  Revival
19h
comment Why is the sky of the moon always dark?
Try this link, fourth row pixshark.com/earth-from-moon-nasa.htm
21h
comment What is the definition of parity conservation?
well, parity is a quantum number, it is either + or -, i.e. the system is unchanged under mirror reversal or changes sign. look at J-P in these tables pdg.lbl.gov/2014/tables/rpp2014-sum-quarks.pdf
22h
comment Given that matter cannot escape a black hole, how did the big bang produce the universe we see today?
-1 , there exists the small detail of mathematics, of which you seem to be ignorant
1d
comment Is a nuclear bomb in some sense a bullet travelling at the speed of light, but along time rather than along space?
@magma , no copied from the wiki article from which the quote comes. thanks for the alert
1d
revised Is a nuclear bomb in some sense a bullet travelling at the speed of light, but along time rather than along space?
added link
1d
answered Why does measuring the spin of an entangled particle cause it to become unentangle?
2d
answered What is the mechanism behind the wave - particle duality
2d
comment Synchronized rotation of the moon
I have answered in my last paragraph. The tidal forces are too weak to have produced a tidal locking of the earth to the sun.
2d
awarded  Revival
2d
answered Alpha particle in vacuum
2d
answered What's the next big goal of the Large Hadron Collider?
Mar
26
awarded  electricity
Mar
25
answered Is a nuclear bomb in some sense a bullet travelling at the speed of light, but along time rather than along space?
Mar
25
answered Have scientists always known that the Sun was not a fuel+air system?