It is sure media will effect on particles.I think there are two different phrases in physics, classical and modern.Here,measurement the former,photon the later.QM says photon is spreading in space. One can get its state function also its probability of some classical...
phase velocity and group velocity
c is defined as group velocity of EM wave:
\frac{\omega}{k}
I think c of one photon is less meaning.
From the point fo quantum,position of one particle is uncertain.
Excuse me to expand this topic.
Seeing in some degree defines the area of science in my eye.Things which can be detected, measured by the physical device are significative.
Seeing in science has a special meaning.
Scientist have seen atoms with indirect way,such as STM.And there are a group of man-made molecule that can be seen with classical method.With the help of modern detecting technology,quark may be the next to "be scaled".
try to correct and solve this problem
the Schrödinger time-independent equation is written as:
-\frac{h^2}{2m}\frac{d^2}{dx^2}\psi (x)+U(x)\psi (x) = E \psi (x)
Here,I would like to demonstrate the case of 0<E<U.Consider a barrier with a potential of U and width of a.For simplifying,the...
superfluid with finite speed
As we all know,material in superfluid phase has a critical speed,Vc,under which superfluid can be achieved.Particles constituting the material are all in groundstate.They are almost independent without any effect on others.But if their kinetic energy is over...