61,792 reputation
237153
bio website
location Greece
age 75
visits member for 4 years, 3 months
seen 5 hours ago

Retired experimental particle physicist.

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


Apr
10
comment How do solar panels generate infinite electricity?
@EnergyNumbers yes, there is absorption in the atmosphere and reflection to be taken into account. I will edit.
Apr
10
answered Why is static electricity called static?
Apr
10
comment Charge of a moving particle
also Bqv=mv^2/r would not work , and no circles would appear, contrary to this alamy.com/…
Apr
9
comment The nature of measurement
and then it has the atomic probability function. QM probabilities are the same as classical ones. Just that the curve for our probable lifetime ( for example) is not sinusoidal in time :).medicine.ox.ac.uk/bandolier/booth/Risk/dyingage.html
Apr
9
comment The nature of measurement
One has to stop thinking of "quantum mechanical entities" either as particles or as waves. They are best represented by a probability function which is the probability to appear as a particle at an (x,y,z,t). In between measurements the psi changes because the measurement changes the boundary conditions which define the psi. The probability has a wave structure as shown above, in all its manifestations. It is particles that leave a signal in the detector and then in that detector a new probability fucntion will exist for the electron until it is completely absorbed in an atom.
Apr
9
comment How do solar panels generate infinite electricity?
Also this hyperphysics.phy-astr.gsu.edu/hbase/electronic/ligdet.html#c3
Apr
9
comment How do solar panels generate infinite electricity?
Have a look at this physics.org/article-questions.asp?id=51 "When these two materials are placed side by side inside a solar cell, the n-type silicon’s spare electrons jump over to fill the gaps in the p-type silicon. This means that the n-type silicon becomes positively charged, and the p-type silicon is negatively charged, creating an electric field across the cell. Because silicon is a semi-conductor, it can act like an insulator, maintaining this imbalance". A closed circuit moves charges and generates a current, an open one not.
Apr
9
comment How do solar panels generate infinite electricity?
@LDC3 continuously renewable as far as the input to our solar panel
Apr
9
answered How do solar panels generate infinite electricity?
Apr
9
comment How do solar panels generate infinite electricity?
@Bhavesh electricity is not a physical observable. It is an every day term to cover , like electrical. to cover the whole field. Physical are"electric current" , "electric field", "voltage" , "resistance" , etc. So infinite electricity has no meaning anyway
Apr
8
comment How do solar panels generate infinite electricity?
@jameslarge I should have used sarc\
Apr
8
comment How do solar panels generate infinite electricity?
tf.uni-kiel.de/matwis/amat/semitech_en/kap_8/backbone/… circuits usually close and replenish the electrons.
Apr
8
answered The nature of measurement
Apr
8
comment Is there any difference between fusing and smashing particles?
It is the difference between stable bound states and generation of new particles out of the excess energy, most of them unstable and certainly not one bound state.
Apr
8
comment Why dark matter and general relativity?
@RobJeffries As an experimentalist I go with the simplest explanation. Even if there were no general relativity and the universe were flat, the simplest explanation is dark matter. It was also the first evidence for it that made people run and look for compatibility with GR. So it is not circular, it is the beginning of the story. It is on par with starting with newtonian physics and then going on to GR. The newtonian answers suffice for a lot of the phase space.
Apr
7
revised Why dark matter and general relativity?
spelling
Apr
7
comment Why dark matter and general relativity?
@Joseph No, I am talking of the planetary system that has been studied for centuries, let alone balistics etc on earth. classical mechanics is well validated.
Apr
7
answered Why dark matter and general relativity?
Apr
7
awarded  Revival
Apr
7
answered Drying clothes with the sun's heat, without any air