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This principle states that every effect must have a cause.
causality
A range or sequence that has no clear divisions or breaks — like space and time in Einstein’s theories.
Continuum
This mysterious quantum phenomenon links two particles so that changing one instantly affects the other, no matter the distance.
quantum entanglement
In paradoxes about motion, this slow animal races Achilles to illustrate the limits of logic and time.
tortoise
A title given to someone who has received an honor such as the Nobel Prize.
laureate
A hypothetical tunnel connecting distant points in space-time.
a wormhole
This term describes the quantity of motion of a moving body, equal to its mass times velocity.
momentum
Heisenberg’s famous principle states that you can’t simultaneously know a particle’s position and velocity with complete precision.
the uncertainty principle
Scientists and philosophers often use this word to describe a conceptual structure that supports a theory or system of ideas.
framework
In quantum mechanics, this mathematical function describes the probability of finding a particle in a particular state.
a wave function
In science fiction, this occurs when events repeat because of a disturbance in the flow of time.
a temporal loop
Einstein and Schrödinger both used this kind of mental exercise to test scientific theories.
a thought experiment