w****o
发帖数: 20 | 1 Where to find such "real vacuum" in universe?
For example suppose you have a box on your hand with "real" vacuum
inside, but below the box is earth, above the box is sun, the
gravitational field between sun and earth cannot be screened and
must panetrate your box, so there is at least this field inside your box.
Field has energy(mass), momentum, and it is just another form of matter,
so there is no absolute vacuum in universe.
在 klavier (蓝猫) 的大作中提到: 】 |
|
