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229100
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location Greece
age 74
visits member for 3 years, 6 months
seen 10 mins ago

Retired experimental particle physicist.

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


2d
comment How to feel or sense magnetic fields from earth?
a compass is simpler than the gadget you describe. true you have to look at it
2d
comment Can the distance over time of an electron between two measurements be higher than the speed of light?
You are addressing the first part of the question and I am addressing the second , given as an example by the OP. Should I make a snide remark about your answer and give you a -1?
2d
answered What causes radioactivity? Is it a quantum mechanical effect?
2d
comment Why does light travel at the same speed when measured by a moving observer?
When one asks a "why" question in physics on fundamental postulates, the only real answer is "because" by assuming this, the theory describes the data and it has not been falsified up to now.
Jul
26
answered Faraday Effect does light bend or lose energy?
Jul
25
comment How does the nature of nuclear force change between attractive or repulsive based on distance?
did you notice it is a high school student asking a question?
Jul
25
comment How does the nature of nuclear force change between attractive or repulsive based on distance?
@BenCrowell The analogy does not hold, because there is no repulsive strong force between quarks in analogue to the same charge repulsion of electromagnetism in atoms. The strong forces is always attractive except where the pauli principle applies.
Jul
25
comment number of gravitons launched by a proton
@JerrySchirmer Sure. But the very concept of a virtual particle comes from such diagrams , i.e. the format of calculating crossections for a process. It is the successful fitting of data with calculations that gives them "existence" , as poles, with the quantum numbers of the "real" particles.
Jul
24
revised At Interfaces Does Light Have to Accelerate?
added 1 character in body
Jul
24
answered At Interfaces Does Light Have to Accelerate?
Jul
23
answered If wavefunction is just a probability function, how does an electron interfere with itself
Jul
23
answered Why do I hear the telephone ring through grandpa’s hearing aid before the actual phone rings?
Jul
23
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.
Jul
23
answered Jumping sewer lid - WHY?
Jul
22
awarded  Nice Answer
Jul
22
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.
Jul
22
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.