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239155
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location Greece
age 75
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Retired experimental particle physicist.

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


2h
comment The nature of measurement
THE WAVE IS A PROBABILITY WAVE, sine/cosine function, a distribution which means many entries. Each entry is a particle, because of the way of detection, a spot on the screen, a voltage change in a detector etc. One point for each entry in the final probability distribution. Every and any change in the boundary conditions will change the pattern on the screen reflecting the change in the probability distribution . If you read the last link, the most probabe effect of measuring before the slits will be to destroy the pattern, introducing many point sources and destroying coherence.
12h
answered Do the electric and magnetic components of an electromagnetic wave really generate each other?
1d
answered BINDING ENERGY OR BINDING ENERGY PER NEUCLEON REMAINS CONSTANT
1d
answered Rain system movements and highways?
1d
revised Learning Experimental Physics
added 308 characters in body
1d
answered Learning Experimental Physics
1d
comment Is the acceleration of a soap bubble the standard value of gravitational acceleration?
The actual motion depends also in the air in the bubble, how dense it is with respect to the air outside, then there is buoyancy lifting the bubble. If it is the same density then it will just float. The last two are what really happens
2d
revised Who foots the (magnetic) energy bill?
clarification
2d
revised Who foots the (magnetic) energy bill?
clarification
2d
answered Who foots the (magnetic) energy bill?
2d
comment Are all ground state protons the exact same mass and have the same number of elementary particles?
Yes, the number or partons within the proton will be different in this QCD mathematical theory. It is the integrals and total sums that have to add up to the mass and the baryon number and charge.The mass is the length of the four vector of " the sum of all the constiuents". That is why the mass of the proton is so much larger than of individual quarks. It is similar to the mass of the pi0 which decays into two zero mass gammas although it has over 100 MeV of mass itself
2d
comment Is light a particle with EMF or does it travel in wave?
@CuriousOne QFT is one side of it. I have seen it described as the wave function.
May
3
comment Is light a particle with EMF or does it travel in wave?
@CuriousOne Have a look at motls.blogspot.com/2011/11/… . The wave functions constructed for photons use A the potential of the Maxwell equations and the differentials as operators. Thus the photon has in its probabilistic mathematical form the seeds of the electric and magnetic fields, even without other charged particles around
May
3
revised Are all ground state protons the exact same mass and have the same number of elementary particles?
added 76 characters in body
May
3
answered Are all ground state protons the exact same mass and have the same number of elementary particles?
May
2
revised What do gravitons do?
clarified field
May
2
answered What do gravitons do?
May
1
comment You are trapped on a frictionless sheet of ice. Can you escape by inhaling in one direction, then exhaling in the opposite direction?
One could also use a snorkel, in the appropiate direction, so one need not have to turn the head.
May
1
awarded  neutrinos
Apr
30
awarded  Good Answer