Discussion
In quantum mechanics, the Heisenberg Uncertainty Principle relates to which of the following pairs ?
Answer: C
The key's answer is Position and momentum.
Heisenberg's uncertainty principle (1927) states that the position and the momentum of a particle cannot both be known exactly at the same time: the product of their uncertainties is at least \(\hbar/2\). This is the pair the principle is defined by.
An analogous relation between energy and time is often quoted alongside it, but the principle's standard statement is about position and momentum. Mass and energy are linked by Einstein's \(E = mc^{2}\), and velocity and acceleration are not an uncertainty pair.
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