Certain pairs of physical properties, such as:
- position and momentum
- time and energy
cannot be simultaneously known to arbitrarily high precision.
approximate | more precise | |
---|---|---|
distance/momentum | Δx Δp < h | σxσp<= h/2 |
time/energy | ΔE Δt < h | σEσt <= h/2 |
where:
- x = distance
- t = time
- p = momentum
- E = energy
- h = (h in h/2 should have line drawn through bar of h)
- σ = standard deviation