Yes, double-slit experiment can be done with natural light. After all, laser wasn't invented when Thomas Young did his experiment. The light coming out of the two slit actually interference with itself. What is needed is the radius of the hole is approximately equal to the wavelenth of light. I...
yeah, i know what i was saying is wrong(it doesn't happen in experiment). but since the principle of superposition is a fundamental rule in QM and we did it in other occasions, like the two slit experiment, why "sum" all the individual wavefunctions leads to trouble here?
any isolated macroscopic system, like a large group of atoms, always tends to reach a state that has the maxium entropy. if the electrons in this group of atoms are excited, they will give out their energy so that more degrees of freedom are activated, hence the entropy of the whole system...
can i say this way? The state of the whole system is the superposition of all single atom wavefunctions. since all atoms are in the same state( on the same ray), but their phase are randomly distributed. we sum up all the wavefunctions, we get zero?the atoms cancel each other because of their...
I just read a review paper on Boson-Einstein condensation for the first time. I have 2 questions.
1.Can anyone tell me why all experimental realization of BEC are done in alkali metal gas, like Na, Cs? Can the interaction between atoms be totally neglected?
2.A facinating property of BEC gas...