At https://mindmatters.ai/2022/08/has-a-sup...s-physics/.
Fine tuning is real, and astrophysicist Sir Fred Hoyle (who started as an atheist) had to think again when he discovered the most significant aspect or parameter of fine tuning, the nucleosynthesis of carbon (essential to life) in stars. The following is just the tip of the iceberg of the entire picture of fine tuning of the laws of physics that has been elucidated over the years.
Fine tuning is real, and astrophysicist Sir Fred Hoyle (who started as an atheist) had to think again when he discovered the most significant aspect or parameter of fine tuning, the nucleosynthesis of carbon (essential to life) in stars. The following is just the tip of the iceberg of the entire picture of fine tuning of the laws of physics that has been elucidated over the years.
Quote:It looked like, in order to form carbon, the gravitational forces must be extremely finely tuned and they must be balanced just right with the electromagnetic forces. And this turned out to be just the tip of the iceberg.
There was a whole suite of these so-called cosmic coincidences, where everything had to be just right to explain what was necessary to life. Just to produce carbon, here are five of these cosmic coincidences:
1. The gravitational force (what physicists [call] the force constant) that determines the exact strength of gravitation had to be just right. If it were larger, stars would be too hot and they would burn up too quickly and too unevenly. If the gravitational force constant and the force of gravity were smaller, stars would remain so cool that nuclear fusion would never ignite. And hence there’d never be any heavy element production.
2. The electromagnetic force constant also had to be delicately balanced. If it was larger, the chemical bonding wouldn’t occur, and elements more massive than boron1 would be too unstable for fission. If smaller, it would be insufficient to produce chemical bonding. And so it went.
3. and 4. The other fundamental forces of physics, the so-called strong nuclear force and weak nuclear force also had to be delicately balanced. If either of these forces were too large or too small by very small fractions, there would be no possibility forming stable elements. The basic chemistry of life would be impossible and we would not have a life permitting universe.
5. On top of all of that, it turns out that the fundamental units of matter, quarks, which make up the protons and neutrons, had to have very precise masses in order for the right nuclear reactions to occur that would produce the right elements, such as carbon and oxygen that are necessary for a life-permitting universe. And in the case of the mass of the quarks, there are up quarks and down quarks. Nine separate sets of criteria must be met simultaneously to make the basic chemistry of life possible.
As Hoyle began to reflect on all this, it occurred to him that we lived in a kind of Goldilocks universe, where everything was just right. The forces were not too strong, not too weak. The masses were not too large, not too small. And he started to rethink his staunch materialist atheist worldview…