i want to know what is physical idea behind "correlation function"
as you know in quantum we define <B(t)B(s)> , B(t) and B(s) are operators in different time. and angular bracket shows averaging.
is this definition say that if correlation function does not vanish then the observables...
what is Spin Hall effect and quantum hall effect?
i can not find a good description on wikipedia.com do you have a good link or description?
and another question: why in franck hertz experiment we use MERCURY instead of hydrogen?
in Ballmer series does the electron fall from layer n=4 to layer n=3 .if does why we see 3 line of light that are originated from falling electron from layers n=3 , 4 , 5 to layer n=2 but we do not see the line of light that is originated from falling electron from...
in Ballmer experiment we have a lamp of hydrogen gas and we put on it a high voltage in order to excite the electron . then we see 3 line of light. this 3 line of light are resulted from falling electron from layer with n=3 , 4 ,5 to layer with n=2.
in Ballmer expriment which we see...