## Structure of Atom

# Heisenberg uncertainty principle

**Heisenberg's Uncertainty Principle :**

\triangle x.\triangle p \geq \frac{h}{4\pi}

Δx = uncertainty in the position

Δp = uncertainty in momentum

Δp = Δ(mv)

= mΔv

\triangle x.\triangle v \geq \frac{h}{4\pi m}

### View the Topic in this Video from 0:40 to 11:55

Disclaimer: Compete.etutor.co may from time to time provide links to third party Internet sites under their respective fair use policy and it may from time to time provide materials from such third parties on this website. These third party sites and any third party materials are provided for viewers convenience and for non-commercial educational purpose only. Compete does not operate or control in any respect any information, products or services available on these third party sites. Compete.etutor.co makes no representations whatsoever concerning the content of these sites and the fact that compete.etutor.co has provided a link to such sites is NOT an endorsement, authorization, sponsorship, or affiliation by compete.etutor.co with respect to such sites, its services, the products displayed, its owners, or its providers.

1. In terms of uncertainty in position, ΔX and uncertainty in momentum ΔP, this principle is written as,\tt \triangle X.\triangle P \geq \frac{h}{4\pi}

2. In terms of uncertainty in energy, ΔE and uncertainty in time Δt, this principle is written as,\tt \triangle E.\triangle t \geq \frac{h}{4\pi}