Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: talanum1 on 04/11/2020 15:45:54

Title: How can conformal cyclic cosmology exist?
Post by: talanum1 on 04/11/2020 15:45:54

Sir Roger Penrose says since mc^2 = hf clocks require mass, and his operation of squashing infinity requires it. Therefore his Conformal Cyclic Cosmology depends on it. Yet the very same mathematics says E = hf, so just energy also implies clocks. This undermines his theory.

Title: Re: How can conformal cyclic cosmology exist?
Post by: Zer0 on 27/03/2021 08:54:49

Hi there @talanum1
🙋

Conformal Cyclic Cosmology is a Very Interesting cosmological model idea.
👍

Although, I'm Not an Expert, just a Layman hence i would Not be able to contribute much towards your OP.
👎

Hopefully, the Subject Matter Experts might spread a lil illuminance on it in the very near future.
🙏

P.S. - Sorry bout the Xtreme delay in response.

Title: Re: How can conformal cyclic cosmology exist?
Post by: jeffreyH on 27/03/2021 10:10:36

Quote from: talanum1 on 04/11/2020 15:45:54

Sir Roger Penrose says since mc^2 = hf clocks require mass, and his operation of squashing infinity requires it. Therefore his Conformal Cyclic Cosmology depends on it. Yet the very same mathematics says E = hf, so just energy also implies clocks. This undermines his theory.

There is a mass/energy equivalence. Also there are various types of energy. Rest energy, kinetic energy, potential energy etc etc. His theory involves the concept of the end of one universe initiating the next big bang. If the universe experiences heat death and all the black hole evaporate you have a situation where time has no meaning. Much like before the big bang. In this theory there is also no big crunch.

When you have heat death there is no more useful energy available to do work. So it is not possible to construct a clock. it doesn't matter which energy equation you cite.

Title: Re: How can conformal cyclic cosmology exist?
Post by: yor_on on 30/03/2021 12:06:40

You can take a look at this.   https://www.forbes.com/sites/quora/2016/12/28/einstein-believed-in-a-theory-of-spacetime-that-can-help-people-cope-with-loss/

And a more modern formulation  https://phys.org/news/2011-04-scientists-spacetime-dimension.html

It depends on how you look at it. Clocks as needed for 'time' to exist, or not.

But   https://www.forbes.com/sites/startswithabang/2020/10/08/no-roger-penrose-we-see-no-evidence-of-a-universe-before-the-big-bang/