Is energy really quantised?
64508
Where exactly does energy quantisation come in for light?
41470
Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics?
45625
Is energy content of a system different depending on the observer?
16145
Conservation of energy in quantum teleportation
144698
Why do many people say that virtual particles do not conserve energy?
104024
Does the mass of an electron change with its "energy state"?
117292
Is energy the ability to do work?
146039
Is it always possible to define energy of a system?
21277
Why quantising gravity necessarily give us gravitons?
20997
Can an electron jump to a higher energy level if the energy is insufficient or exceeds the $\Delta E$?
2657
Can energy be taken out of the QFT vacuum?
105342
How did Planck arrive at the idea that energy is quantized?
116033
Energy conservation limited by uncertainty principle
74582
How can blackbody radition be explained by quantization?
122561
Is the energy always discrete?
119581
How to understand whether potential energy increases or decreases?
629
How are Quantum Mechanical energy levels related to atom shells?