Heisenberg imagines that electrons do not always exist. They only exist when someone watches them, or better, when they are interacting with something else. In quantum mechanics no object has a definite position, except when colliding headlong with something else.
Penguin Books Limited
A Penguin Random House Company
©1995 - 2018 Penguin Books Ltd. Registered number: 861590 England.
Registered office: 20 Vauxhall Bridge Rd, London, SW1V 2SA, UK.