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234123
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location Greece
age 74
visits member for 3 years, 10 months
seen 3 mins ago

Retired experimental particle physicist.

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


35m
comment About the Large Hadron Collider
Here is CERN on facebook. facebook.com/cern . ask them? keep in mind the the price of one airplane carrier is in the billions and running it almost half a billion for 1 carrier facebook.com/cern
12h
comment Why is energy of emitted particles negative?
The NEGATIVE refers measured to the height of the coulomb barrier in the images of the links, I believe. Not negative energy level.
12h
comment Why is energy of emitted particles negative?
This link clearly shows that in tunneling the particle keeps the same energy level. hyperphysics.phy-astr.gsu.edu/hbase/quantum/barr.html . this for alpha decay hyperphysics.phy-astr.gsu.edu/hbase/nuclear/alptun.html and this hyperphysics.phy-astr.gsu.edu/hbase/nuclear/alpdec.html
15h
revised References for experimental results of the double-slit experiment
edit after comments
16h
comment References for experimental results of the double-slit experiment
@brightmagus the solutions are plane waves, the interpretations is that they represent the probability distribution of the impinging particles . Maybe it is my syntax but I think that is what I ams saying. The solutions, not the electrons.
16h
comment References for experimental results of the double-slit experiment
@brightmagus but that is exactly what I am saying. The plane waves are PROBABILITY waves, each electron follows a plane wave probability solution, one entry.
18h
revised References for experimental results of the double-slit experiment
added missing link
18h
revised References for experimental results of the double-slit experiment
clarification
21h
comment References for experimental results of the double-slit experiment
See the answers to this question physics.stackexchange.com/questions/437/… . For how the photons build up the classical wave see here motls.blogspot.com/2011/11/…
22h
comment References for experimental results of the double-slit experiment
@IllegalImmigrant it is a boundary condition. The two slit experiments create conditions of a coherent plane wave, laser light for example, because the solutions are simple. For more complicated experiments yes, fourier transforms simplify the solutions.en.wikipedia.org/wiki/Fourier_transform_spectroscopy
22h
comment References for experimental results of the double-slit experiment
It is maxwell's equations in the potential form turned into operators operating on the psi of the photon. This is the general one. One has to solve it for the specific experimental situation. The bounds is a plane wave impinging on two slits. The mathematics is exactly the same as shown in the links above , except for the interpretation as a probability amplitude. cosines and sines do not know whether they are used to model a quantum phenomenon or a classical one. Only the user knows.
1d
answered References for experimental results of the double-slit experiment
1d
answered Quantum Entanglement Versus Inflation in the Early Universe?
1d
comment How do two electrical charged particles know to repel or attract each other?
@Sofia I am an experimental physicist. For me , exists means "can be measured by some proxy" , not that a mathematical formula exists. As there are other ways of measuring and fitting the crossections etc not needing the mathematics of virtual particles, I do not apply the verb "exists" to a virtual electron, as I apply it to the on mass shell electron that can leave a track in my chamber :).
2d
revised How do two electrical charged particles know to repel or attract each other?
clarification
2d
answered How do two electrical charged particles know to repel or attract each other?
2d
revised What role does the Higgs Field play in the universe?
addressing last part of question
Nov
25
comment Why does iron sink in molten iron instead of floating?
you are missing a concluding sentence to the effect that iron in solid form is denser than in liquid, to complete the answer.
Nov
25
answered What role does the Higgs Field play in the universe?
Nov
25
comment Pre-Higgs Energy of electron
Without the higgs mechanism all masses are zero. Energy is a variable depending on context. Have a look for essentials en.wikipedia.org/wiki/Higgs_mechanism