Part 5/9:
Penrose posits that gravity plays a crucial role in our understanding of the wave function's collapse. By insinuating a connection between the physical process of state collapse and gravitational interactions, he aspires to bridge the disconnect that many physicists experience when trying to apply quantum mechanical rules to macroscopic objects.
He references a phenomenon relevant to this argument: the Planck mass—the mass of an object at which quantum gravitational effects are expected to arise. At or above this mass, Penrose theorizes that the collapse of superpositions occurs, resulting in a transition from quantum mechanics to classical physics.