Uncertainty Principle

The product of a function’s widths in the time domain () and the frequency domain (spectral width) () must be greater than ~1

• From the Scale Theorem: the shorter a Pulse in time, the broader the spectrum, and vice versa Cannot have a short pulse that is monochromatic
• Not inherent to Quantum Mechanics, but to Waves

Also:

For functions of and

Heisenberg’s Uncertainty Principle for Momentum and Position

Heisenberg’s Uncertainy Principle for Energy and Time