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229100
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location Greece
age 74
visits member for 3 years, 6 months
seen 4 hours ago

Retired experimental particle physicist.

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


10h
revised At Interfaces Does Light Have to Accelerate?
added 1 character in body
10h
answered At Interfaces Does Light Have to Accelerate?
1d
answered If wavefunction is just a probability function, how does an electron interfere with itself
1d
answered Why do I hear the telephone ring through grandpa’s hearing aid before the actual phone rings?
1d
comment Why do I hear the telephone ring through grandpa’s hearing aid before the actual phone rings?
so the question is "what type of hearing aid?" maybe as Chris says it is designed to catch phone signals which, as they come, must radiate electromagnetic waves too.
1d
answered Jumping sewer lid - WHY?
2d
awarded  Nice Answer
2d
comment How do substances with like charges repel each other?
then you should try and make more coherent statements not left to the imagination of the reader.After all excess electrons do not exist in normal matter, which has as many electrons as protons, unless set up on purpose. I am clarifying how this excess can happen, and then look at the effects.
2d
answered In terms of physics, does the phrase “time slows down” mean the same thing as “things happen more slowly?”
Jul
21
answered Strength of strong nuclear force vs distance?
Jul
21
answered How do substances with like charges repel each other?
Jul
21
comment How do substances with like charges repel each other?
@VolkerSiegel Not to worry, your answer is on a higher level than the question.
Jul
20
comment Differences between wavefunction, probability and probability density?
+1 for addressing the wavefunction connection to probabilities clearly. I think if people can have clear in their head that quantum mechanical probabilities are the same as probabilities for classical or even for economics events, then the famous "collapse" of the wavefunction can be seen as trivial as picking up an "instance" that builds up a probability distribution, the same as with population probability functions, for example.
Jul
19
answered For a planet which has a temperature gradient, hot in the center and cooler on the surface, why do we get absorption lines?
Jul
19
revised For a planet which has a temperature gradient, hot in the center and cooler on the surface, why do we get absorption lines?
spelling in title and body
Jul
19
comment For a planet which has a temperature gradient, hot in the center and cooler on the surface, why do we get absorption lines?
so you really mean planet? I will edit because as is it is very confusing
Jul
19
comment Has the photon both gravitational and inertial mass?
The photon in the standard model has 0 mass, no adjectives attached. en.wikipedia.org/wiki/Standard_Model . This question belongs to science fiction. I reacts to to gravity through its energy, by special and general relativity rules that have been validated over and over. Mass is defined as the length of the four vector describing a particle and it is an invariant. en.wikipedia.org/wiki/Invariant_mass
Jul
18
answered If there were fundamental forces weaker than gravity, would we know about it?
Jul
18
comment What is the frequency of a photon emitted by an accelerated charged particle?
there are spectra for brehmsstrahlung en.wikipedia.org/wiki/Brehmstrahlung ands synchrotron in en.wikipedia.org/wiki/Synchrotron_radiation
Jul
18
answered Could Dark Matter particles that don't couple to quarks or leptons have been produced?