NUCLEAR REACTION IN THE SUN.
The sun is mainly composed of hydrogen.It has a little amount of helium and a slight amount of other heavy elements.
A large amount of energy keeps issuing out of it continuously at all times.The temperature of its is core is about five (5) Million degrees celsius. Its energy is due to fusion reaction called P - P reaction. During this process, two hydrogen nuclei or two protons combine to form deuteron.
This reaction takes place as
The result of different stages of this reaction is that 4 protons have formed one helium nucleus. In this P - P chain raction 25.7 Mev energy is given out i.e 6.4 Mev per nucleon energy is obtained which is much greater than the energy given out per nucleon (1 MeV) during a fission reaction.
