Hot Big Bang Theory
Hello friends, welcome in the Cosmic Empire.
Hot big bang has been described below. It is different from big bang theory. Actually
this theory tells us what happened after big bang and how this well ordered
universe created. So let’s start-
After big bang the universe started expanding and its infinite temperature started coming in a lower point. This cooling of the universe affected most the quantum particles because we know the internal energy (static and kinetic energy) of the particle depends only on temperature. At high temperature the particles would be moving rapidly, being apart from each other because they had no effect of electromagnetic or nuclear force due to their speed but when the temperature got down, the speed of the particles would go slow and they would start dumping.
When the temperature was high the
particle had high energy so when the particles and antiparticles annihilated,
they generated more particles. In this way they would be produced more rapidly
than they could annihilate. But at lower temperature, particles have less
energy so they would annihilate more rapidly than they would produce.
One second after the big bang, the temperature fallen about ten thousand
million degrees from infinite. And the temperature, it got, was at least equal
to the centre of sun (almost 15,000,000°c). If you are so
keen to feel this temperature, you should explode a Hydrogen Bomb. At this time
there would be photons, electrons and neutrinos with their besides this our
universe would have contained some protons and neutrons. When electrons and
antielectrons would have annihilated, they would produce photons. But some
electrons left over and nuclei can’t annihilate with each other because they
interact very weakly. So even now they exist in our universe but with so less
energy that it is very hard to detect them.
Origin of Nuclei: When our universe born and passed its hundred seconds, its temperature dropped about one thousand million degrees and reached equally at the temperature in the centre of sun. How come! Even a cup of tea takes at least 10 minutes to get normal. Anyway, when this happened, neutrons and protons got an attraction which is called strong nuclear force. Actually, protons and neutrons lost their energy when the temperature fell down. They had less kinetic energy. So they started combining to produce a deuterium atom (1H2: 1 proton and 1 neutron) and then combined with more protons and neutrons to make helium nuclei which contains two protons and two neutrons. In this way other heavy atoms were produced.
So friends, it was today’s subject. I hope you may like it.
Origin of Nuclei: When our universe born and passed its hundred seconds, its temperature dropped about one thousand million degrees and reached equally at the temperature in the centre of sun. How come! Even a cup of tea takes at least 10 minutes to get normal. Anyway, when this happened, neutrons and protons got an attraction which is called strong nuclear force. Actually, protons and neutrons lost their energy when the temperature fell down. They had less kinetic energy. So they started combining to produce a deuterium atom (1H2: 1 proton and 1 neutron) and then combined with more protons and neutrons to make helium nuclei which contains two protons and two neutrons. In this way other heavy atoms were produced.
So friends, it was today’s subject. I hope you may like it.
-Thank You
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