During last lecture from Quantum Mechanics we heard depressing and disappionting news.
When we look at the world classically we can make statements that it has zero energy, in Quantum world there is always some energy.
Systems always oscillate at least a bit. So now if we have a space and even it seems empty then it will have infinite amount of those small energies.
We also know that the general relativity implies that all the forms of energy gravitate, and if we have a infinite energy then we have infinite mass which leads to infinite gravity.
If that was true then our universe would collapse in an instant.
This collapse is not a problem, because well it hasn't happened.
The problem is that I am studying a theory that we successfully use in everyday life (all modern technology was possible because we understood quantum mechanics). But yet same theory cannot completely explain why our universe is still around.
I might have got it all wrong but it bothers me a lot.
