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 Jul 27 comment Question on the uncertainty principle Is it possible that the velocity of the proton is constant and therefore velocity uncertainty is constant too??? Jul 27 asked Question on the uncertainty principle Jul 27 asked Connection between $\Delta x \Delta p \geq \frac{\hbar}{2}$ and $\Delta E \Delta t \geq \frac{\hbar}{2}$ Jul 26 comment Bra–ket notation & Schrödinger's cat intepretation Thank you for the comment. I am still learning QM myself. Jul 26 answered Bra–ket notation & Schrödinger's cat intepretation Jul 26 accepted Harmonic oscillator - wavefunctions Jul 26 accepted Replacing an operator with its expectation value Jul 25 comment Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection The result matches perfectly with the solution in the book. Jul 25 comment Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection Thank you for the hint. I still appreciate if anyone else finds an anwser in a relativistic way. Jul 25 accepted Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection Jul 25 comment Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection It really works fabulous if nonrelativistic approach is used. Can you just tell me how, did you know that nonrelativistic should be used here? When did you first think of this? What was the trigger... ? Jul 25 comment Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection I always have a problem, because i totaly forget that we can deal with a problem in a nonrelativistic aproximation. But if a relativistic derivation is possible it would be really nice. Jul 25 comment Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection I like this but is there a correct way to do it relativistically. Jul 25 accepted Calculating an energy of an electron with known De Broglie wavelength (why can't we calculate it similar than we do it for a photon) Jul 25 revised Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection added 624 characters in body Jul 25 asked Problem similar to Davison & Germer eksperiment but with more angles and the mirror reflection Jul 25 comment Calculating an energy of an electron with known De Broglie wavelength (why can't we calculate it similar than we do it for a photon) Maybee it really has to do something with a fact that an electron has a mass... Jul 25 asked Calculating an energy of an electron with known De Broglie wavelength (why can't we calculate it similar than we do it for a photon) Jul 23 revised About an Einstein equation Edited all the equations in LaTeX. Jul 23 suggested approved edit on About an Einstein equation