Читать книгу String Theory For Dummies - Andrew Zimmerman Jones - Страница 40

Even while the types of particles identified by scientists became more bizarre and complex, the ways those objects interacted turned out to be surprisingly straightforward. In the 20th century, scientists discovered that objects in the universe experience only four fundamental types of interactions:

 Electromagnetism

 Strong nuclear force

 Weak nuclear force

 Gravity

Physicists have discovered profound connections between these forces — except for gravity, which seems to stand apart from the others for reasons that physicists still aren’t completely certain about. Trying to incorporate gravity with all the other forces — to discover how the fundamental forces are related to each other — is a key insight that many physicists hope a theory of quantum gravity will offer.