Theoretical physics
6 questions tagged Theoretical physics — spanning every one of the seven Ws.
What is quantum field theory?
Quantum field theory is the framework that combines quantum mechanics with special relativity to describe particles as excitations of fields. It is the foundation of modern particle physics.
When was Einstein’s theory of general relativity published?
Einstein completed and published general relativity in 1915, with the final field equations presented in November that year.
Which fundamental force is hardest to unify with the others?
Gravity is generally considered the hardest fundamental force to unify with the others. Physicists still lack a complete quantum theory of gravity.
What is a unified field theory?
A unified field theory is a proposed framework that would describe all fundamental forces in a single theory. Physicists have successfully unified some forces, but not all of them together yet.
How does the Standard Model explain the four fundamental forces?
It explains three forces through particle exchange: electromagnetism, the weak force, and the strong force. Gravity is not yet included in the Standard Model.
What is a white hole?
A white hole is a hypothetical object in general relativity that would do the opposite of a black hole: matter and light could come out, but nothing could enter. It has never been observed.