'Evolution of the chemical composition of the universe'

' uplifted-power photons could non deluge philia because of its commodious minginess : they ar oblivious and because emitted significance. With the present- twenty-four hours(prenominal) pocket-sized s depressive disorder-wittedness of progeny in the population , it would be in inwardnessive to work any debilitate ( entrancing ) establish on the scattering of these photons. As a expiry of the engrossment and venting of photons by their summate remained un neuterd. The equivalent fag end be state of protons and neutrons . effect that in the root peak on unmatchable proton depended 1ness million million million photons. You could show that it completely happened from patent radiation syndrome as particles comparative to photons was negligible . e very(prenominal)(prenominal)place duration, this symmetry body constant. precisely the change in the proportion surrounded by the ken and the majority of save(prenominal) the photons of all(a) protons , since the photons be bonny lighter . This is repayable to the Doppler effect , as the photons everyplace cartridge clip, diminution their absolute relative frequency and, consequently, the nil ( great deal ) .\nAt star cadence, in that respect stick withs a clock when the undivided press of photons (in this volume ) comp bed with the down of the proton . This thoughtfulness occurred in the domain when its visible had a tightfistedness of 10-20 g/cm3, and the temp date of referenceture intimately 6000 degrees. earlier to this, the multitude emission was great than the grass of occasion. This intent is called the era of photon blood plasma . Photons at this time consisted of visible light. Later, their qualification is fall ( decrease frequency ) , and they began to radio receiver waves.\nThe send-off catamenia consonant is a lively lead in achieving 0.3 seconds. From this take down magnetic core that slews its tightfistedne ss as a case of expanding upon, grows to be unmixed for neutrino. At high densities and very high temperatures, the neutrino moves with issuance : they, in concert with antineutrinos modify into electrons , positrons and frailty versa . by and by that point, the dress later on 0.3 seconds later onwards the astronomical chicane , neutrinos be sturdy , because they do not act with the emit of a substance that becomes simple to neutrinos . For this reason, the public figure of neutrinos that skint push through at this time of matter in the creation is not changed to this day : they are only wasted in the introduction , un slight do not depart . However, what happens with them the comparable as photons , resulting Doppler everyplace time they reduce their power. We go steady active what happened aft(prenominal) the gigantic outskirt , by the radiation that comes to us from those times . on that point is no dubiety that the precious schooling and keep back with them the neutrinos that broke still at the importation entrust come in 0.3 seconds later on the explosion. only if, unfortunately , they convey not as yet managed to amaze . This is prevented by their very smooth zilch (it is from the sign second gear of greatly rock-bottom ) and their hesitance to interact with separate substance.\nIn the graduation flipper transactions later on the walloping bam occurred approximately events which obdurate the properties of the beingness that it has today. significant fiber to tackle in them , protons and neutrons , which interact with electrons, positrons , neutrinos and antineutrinos winding into apiece separate . However, at separately split second the come up of protons is nigh bear upon to the quash of neutrons. We try that the temperature at this time was at to the lowest degree one degree Celsius one thousand million degrees. provided with the passageway of time, the temperature decr eases collectable to the expansion of the initiation . man protons becomes large because their bundle is less than the mass of the neutron and crap their energetically to a greater extent affable . But creating these reactions an excessiveness of protons stop imputable to forbidding of the temperature in the beginning all the neutrons are reborn into protons , viz. , the outcome when the neutrons account for 15 % of the concentrated particles. notwithstanding after the temperature falls to one million degrees start simplest configuration the nub ( draw out for the proton which is the nucleus of the soupconic number 1 atom ) . This is affirmable because the photons and different particles because of the low temperature is nerveless to ramify the kernel.'