Black holes and gravitons ! Anything wrong here?

If no particle can escape from a black hole, how does quantum mechanics (which postulates gravitons) explain that a black hole’s gravitational field extends beyond its event horizon? If the force of gravity is transmitted by an exchange of gravitons, they’d have to escape from the black hole. I know they’re massless, but so are [...]

A question on Quantum Entanglement

I have read a lot about quantum mechanics but have a query. using an entangled photon for this question. If you can’t measure an entangled photon without affecting it’s entanglement then how do we know it was even entangled to start with and not just always a certain “spin”, either up or down. How can [...]