On 06/01/2017 14:14, StarDust wrote:

https://www.youtube.com/watch?v=J3xL...g3ty bvv1x2gw

So, is it empty or not empty?
That is the question!

Not empty. Casimir effect was first predicted in 1948 (pre QCD).
Demonstrated experimentally in 1996 by Lamoureaux.

See:
https://www.scientificamerican.com/a...casimir-effec/

There are always vacuum fluctuations borrowing energy for extremely
short periods of time in accordance with Heisenbergs uncertainty
principle. These quantum fluctuations allow Hawking radiation to escape
from the proximity of a black hole causing it to lose mass.

--
Regards,
Martin Brown