Recent content by bloupo

thank yo, so the electron will actually jump from one energy level to the other(considering the 12eV difference in energy levels) if it encounters a photon of 12,4 eV right ??

What if an electron at a certain energy level receive a little bit more energy from a photon than the difference between its current energy level and the next one, will it jump to it ? I see written in textbooks that the photon energy must exactly match the difference between two energy level...

Thank you very much, I understand that actually by trying to use the same force I m actually advancing fingers at equal and opposite velocities. are we not in a situation where I am actually giving opposite but equal linear momentum m.v ? so p1+p2 = MVcom which should be 0 as well then ?

It's not a homework problem as I am way too old already but it's something that had made me given problem getting to sleep. I'm probably missing smthg. let's say you have a horizontal uniform rod lying on ice such as there is no friction and the normal force equal the weight of the rod. Let's...