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age 75
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Retired experimental particle physicist.

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


Jun
28
revised How is quantum superposition different from mixed state?
corrected mistake
Jun
28
comment How is quantum superposition different from mixed state?
have a look en.wikipedia.org/wiki/Phase_%28waves%29 . The wave function gets its name because it has mainly sinusoidal expressions.
Jun
28
answered Do the interference terms disappear really after decoherence?
Jun
28
answered Is it possible for two events happen at the exact same time?
Jun
28
revised Why doesn't light vibrate in-situ?
bad spell checker replacement
Jun
27
comment Can you depict the electron's electromagetic field?
the electromagnetic field of radiation is relatively simple en.wikipedia.org/wiki/File:Electromagneticwave3Dfromside.gif
Jun
27
answered Why doesn't light vibrate in-situ?
Jun
26
awarded  Enlightened
Jun
26
awarded  Nice Answer
Jun
26
comment Does photon have size measurement because of its particle nature
@danielAzuelos Photons are quantum mechanical entities. They are not waves of energy as classical EM waves. They are described by a probability which depends on a wave function squared, i.e. has a sinusoidal form but it is a PROBABILITY to be at (x,y,z,t) and a point can describe it. The link I gave shows how these probability waves build up the classical wave which is an energy wave traveling in space.
Jun
26
comment Why doesn't atmospheric pressure crush thick walled structures?
Yes, larger area sums up to more force, except inside and outside is balanced dA in dA out to zero. Only if there is a vacuum or extra pressure as in pressure vessels the inside force is larger than the outside and if the walls are not rigid enough to withstand the force there will be an explosion as in in overblown balloon. The area is not a variable in the problem of balancing in and out forces
Jun
26
comment Does photon have size measurement because of its particle nature
@danielAzuelos Yes, the electromagnetic wave needs space , but it is composed out of zillions of elementary particles/photons see motls.blogspot.com/2011/11/…
Jun
26
revised The magnetic field of a magnetic monopole
edit needed for correctin wrong choice
Jun
26
comment The magnetic field of a magnetic monopole
by mistake a minus was hit. I am editing so I can reverse it.
Jun
26
comment How many human cells will get affected at the prick of a pin?
a cosmic muon traversing the human body is like an infinitely thin needle for the order of magnitude of the cell.
Jun
26
comment In a CMCS 2-body system, why does the speed of the particles after collision stay the same?
It is the definition of "elastic " after all. If the kinetic energies of the particles change ( deformation for a classical example) it is called inelastic.
Jun
26
revised How is quantum mechanics compatible with the speed of light limit?
deleted 2 characters in body
Jun
26
answered How is quantum mechanics compatible with the speed of light limit?
Jun
26
comment How many human cells will get affected at the prick of a pin?
it is a biology question
Jun
26
comment Why doesn't atmospheric pressure crush thick walled structures?
The area cannot but be the same, by the definition, only P and F are variable.