quantum
The smallest amount of energy that can exist is a photon, which is a packet of electromagnetic radiation. In quantum mechanics, energy is quantized, meaning it can only exist in discrete amounts determined by the frequency of the radiation.
This is the activation energy.
If the photon is having very less frequency (say v=1Hz) ,then the Energy of such photon will be the smallest one. It can be inferred that the smallest unit of light energy will correspond to the smallest frequency of such quanta. But from the uncertainty principle it limits the energy of a quanta.
The smallest amount of energy in a nuclear blast comes from the energy released by a single nuclear reaction or fission event. This energy is typically measured in units of electronvolts (eV) or kiloelectronvolts (keV).
Those are called radio waves.
The smallest amount of energy that can be emitted or absorbed as electromagnetic radiation is a photon, which behaves like a particle carrying discrete energy. This minimum amount of energy is determined by the frequency of the radiation, according to Planck's equation E=hf, where E is energy, h is Planck's constant, and f is frequency.
a quntum is the smallest amount of energy possible if it is a quntum of light its an electromagnetic radiation (photon)
The smallest quantum of energy for a wavelength of light is a photon, which carries a fixed amount of energy determined by its frequency. This energy is described by the equation E = hf, where E is energy, h is Planck's constant, and f is the frequency of the light.
Amount of energy in a wave is defined by the wave's amplitude. The wave's location on the electro-magnetic spectrum does not define it's energy. However, there could be a correlation between a wave's wavelength and it's energy per wavelength. In this case, it would be your gamma ray.
Smallest amount.
The term quantum is taken from Latin and simply means amount or quantity. In the field of quantum mechanics it has been determined that there is a specific amount of matter, energy, space, or time, which is the smallest possible amount. In other words, energy comes only in certain packages. It cannot be subdivided without limit, into ever smaller amounts. This is not unlike the fact that there is a smallest amount of any given chemical element. The smallest amount of oxygen you can have is one oxygen atom. You can cut it in half, but if you do, it isn't oxygen anymore. However, you can't cut one quantum of energy in half. One quantum of energy is the smallest amount of energy that you can have. No smaller amount is possible. Physicists will express this idea by saying that energy is quantized.
The smallest quantity in E=mc^2 is the mass of a particle or object. This equation shows the equivalence of energy (E) and mass (m) through the speed of light (c). It relates the amount of energy produced when mass is converted into energy.