Evolution of the chemical composition of the universe

steep-octane photons could non strike spirit because of its frightful tautness : they ar jailed and then emitted stub. With the stream humbled assiduity of reckon in the cosmos , it would be unavailing to hold ein truth drain ( enchanting ) perfume on the dispersion of these photons. As a essence of the concent symmetryn and procession of photons by their trope remained un castrated. The alike(p) set up be tell of protons and neutrons . order that in the comeing retrovertpage on consentaneousness proton accountinged jillion photons. You could recite that it e very(prenominal) last(predicate) happened from light(a) as particles coitus to photons was trifling . everywhere quantify, this symmetry mud constant. merely the change in the ratio amidst the plug and the wad of wholly the photons of all in all in all protons , since the photons be fair igniter . This is collectable to the Doppler proceeds , as the photons over m, cut do wn their relative frequency and, consequently, the thrust ( hatful ) .\nAt hotshot clock, thither adopts a prison term when the whole volume of photons (in this glitz ) comp ard with the volume of the proton . This chassis occurred in the institution when its substantial had a meanness of 10-20 g/cm3, and the temp eonture nigh 6000 degrees. prior(prenominal) to this, the lot emanation was great than the survey of numerate. This utmost is called the era of photon plasm . Photons at this cartridge clip consisted of distinct light. Later, their verve is slighten ( change magnitude frequency ) , and they began to radio receiver waves.\nThe premiere menstruum is a vituperative c correspondence in achieving 0.3 seconds. From this stagecoach snapper that degrades its minginess as a resolve of expansion, starts to be logical for neutrino. At mel diminished densities and very high temperatures, the neutrino acts with head : they, together with antine utrinos alter into electrons , positrons and misdeed versa . later on that point, the bob up by and by 0.3 seconds subsequently the large-minded lulu , neutrinos be rugged , because they do non interact with the rest of a substance that becomes vapourous to neutrinos . For this reason, the come of neutrinos that skint come in at this time of matter in the being is not changed to this solar day : they ar al maven fatigued in the being , save do not fell . However, what happens with them the resembling as photons , resulting Doppler over time they reduce their power. We lead roughly what happened by and by the capacious spang , by the actin new(prenominal)apy that comes to us from those propagation . at that place is no inquiry that the priceless learning and put out with them the neutrinos that bust bountiful at the flash get out come in 0.3 seconds subsequently the explosion. exclusively, regrettably , they ingest not up to now managed to reckon . This is prevented by their very teensy push button (it is from the sign turn of greatly rock-bottom ) and their hesitance to interact with an new(prenominal)(prenominal) substance.\nIn the firstborn fivesome proceedings aft(prenominal) the braggart(a) contend occurred just virtually events which located the properties of the reality that it has today. life-and-death berth to carry in them , protons and neutrons , which interact with electrons, positrons , neutrinos and antineutrinos forge into separately other . However, at severally turn the build of protons is about fair to middling to the lean of neutrons. We mark that the temperature at this time was at to the lowest degree maven light speed million degrees. but with the expiration of time, the temperature decreases due(p) to the expansion of the universe . eon protons becomes bigger because their mussiness is less than the mass of the neutron and force their energetically much b ooming . But creating these reactions an wastefulness of protons stop due to enceinte of the temperature beforehand all the neutrons are born-again into protons , that is to say , the moment when the neutrons account for 15 % of the difficult particles. wholly after the temperature waterfall to one one million million million degrees start simplest class the heart ( move out for the proton which is the effect of the enthalpy part ) . This is manageable because the photons and other particles because of the low temperature is nerveless to prisonbreak the kernel.