Modern Physics
Energy-Time Uncertainty
Energy and time cannot both be precisely determined. Related to spectral line widths.
Variables
\Delta EJ
Energy uncertainty
\Delta ts
Time uncertainty
\hbarJ·s
Reduced Planck constant
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Common questions
What is the Energy-Time Uncertainty formula?
Energy-Time Uncertainty is written ΔE ·Δt ≥ℏ/2. Energy and time cannot both be precisely determined. Related to spectral line widths. It belongs to Modern Physics, under Quantum Mechanics.
What are the units in ΔE ·Δt ≥ℏ/2?
In SI units, \Delta E is energy uncertainty, measured in J; \Delta t is time uncertainty, measured in s; \hbar is reduced planck constant, measured in J·s.