Is every kind of energy quantized?

Answer 1

Planck formulated an equation for energy quanta, which is quantized into E=hf (where E is energy, h is Planck's constant: 6.626x10-27 , and f is frequency) to obtain his own exact radiation formula. This also happened to disprove the theory of the Ultraviolet Catastrophe, which is where classical physics failed.

Answer 2

No. In quantum mechanics, typically the allowed energies of bound systems --- like electrons bound in atoms --- are quantized, but unbound systems --- like electrons in a cathode ray tube or the conduction electrons in a metal --- can take on continuous values.

However, there is second meaning of "quantized" in quantum mechanics which is that energy is delivered in discrete bundles, such as photons or electrons. In that sense, yes, every kind of energy is quantized, but the size of each bundle may or may not be restricted to a set of discrete values, as described above.

Answer 3

Observing black body radiations Planck first pointed out that the energy is not continuous but discrete. Like the method of file sharing using the TCP/IP protocol, or simply using different episodes to tell a story in a tv series. He found out that these packets of energy were an integral multiple of a value which was 1.6 * 10^(-19) J. He called this phenomenon the quantization of energy. This led to the birth of Quantum mechanics. Electrons levels can similarly quantized. If electron is at a lower level and it need 1eV of energy to move to the next upper level it needs 1 photon ( an unit of energy).

Answer 4

The subatomic and quantum world can appear to be a strange place which defies common sense.
Electron energy is said to quantized because it can only exist at discreet levels.
Let us say an energy level exists called level 1, other levels can only exist at certain whole number multiples of this. You cannot have energy level 1.2 or 1.6. for instance.
If an electron loses or gains energy it can only do so by a a quantized amount.