Tempeta is described before; it has an Electa and a Magneta which are bounded to each other by Stas. If the composing Electa and Magneta are stationary the Tempeta has no energy, but if they have any spinning motion around the center then they make a pointing vector as P=E×H which is energy flow in that direction. Photon has not mass (no Gravitas included) but has all characteristic of a very tiny Gravita. Clearly it is quantized and is a unit that can carry energy. If it is stationary it shows a potential for energy transfer, so heat transfer is done by Tempeta transfer. 

Any material with Tempeta in its atoms has temperature. Since there were no Tempeta at the beginning of the world creation temperature was zero (Kelvin). 

Fig.27- A Tempeta attached to an electron

Speed of photon motion does not depend to anything and it move with Sf same as Electa and Magneta, but depends to space curvature; it means that Sf slows at speed near to heavy objects. Since Electra and Magneta have speed of Sf then any electric and magnetic radiation has speed of Sf and therefore the gravity waves also have speed of Sf. Gravity between materials exists due to effect of the Electas and Magnetas existing in them. There is not any independent field of radiation with the name of Gravity, but is a secondary field resulted by electric and magnetic fields. Gravita is a clear demonstration of the electro-magnetic field affecting on each other.