I would like to know whether it is possible that planck's constant is not constant but varies throughout spacetime. For example if we were to travel linearly 'backward' through spacetime toward the big bang, would planck's constant decrease until at the big bang singularity, planck's constant would = 0.(adsbygoogle = window.adsbygoogle || []).push({});

Traveling further 'backward' linearly 'past' the big bang, planck's constant would be negative and the 'arrow of time' would be opposite to that observed in our part of spacetime, similar to what would be expected within the event horizon of a black hole.

As planck's constant underpins thermodynamics and quantum theory, this could have profound implications for cosmology.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Variable Planck's Constant

**Physics Forums | Science Articles, Homework Help, Discussion**