| Answer | Crossword Clue |
|---|---|
| RELATIVITY | Historic theory in physics. |
| RELATIVITY | Theory in physics. |
| BOHR | ... theory, in physics |
| QUANTUM | A theory in physics. |
| supergravity | any of various theories in physics that are based on supersymmetry and attempt to unify general relativity and quantum theory and that state that the principal transmitter of gravity is the graviton |
| supergravities | SUPERGRAVITY, any of various theories in physics that are based on supersymmetry and attempt to unify general relativity and quantum theory and that state that the principal transmitter of gravity is the graviton |
