The energy

The energy
Energy is a property of the vector space.
Energy are the vector interactions, form of oscillations and oscillators.
Vector interactions are centripetal and centrifugal.
Centripetal interactions are permanent and limited (gravity and electric arc).
The centrifugal interactions are airwaves.
The oscillators are two centripetal vector interactions, coupled orthogonally,: stationary, that compose the universe substance.
The oscillator is the source of centripetal and centrifugal oscillations.
The oscillators interact with the centrifugal radiations.
A photon, two photons.
It is inappropriate to talk about a "photon" - "emits a photon".
In reality it is a centrifuge interaction, the photon is a spherical wave with a single oscillation (a period)

The interaction photon - oscillator - space
The vector currents of the incident photon, together with those of the oscillator, increases the amplitude (the energy)
The difference in amplitude (energy), "throws" in space a current ("stone").
Vector space, ends a oscillation, doubling the energy emitted by the oscillator.
The oscillator receives a photon and emit two photons.
We observe that, into a crowd of oscillators (atoms), the energy (the radiations) increases in proportion with the density! Chain reaction !