# Dynamic Light Scattering

- Page ID
- 202089

The correlation function for a system experiencing Brownian motion \(G(t)\) decays exponentially with decay constant \(\Gamma\).

\[G(t)=e^{-\Gamma t}\]

\(\Gamma\) is related to the *diffusivity* of the particle by

\[\Gamma=-Dq^{^{2}} \]

where

\[q=\frac{4\pi n }{\lambda}\sin(\dfrac{\Theta }{2})\]

## References

*Dynamic Light Scattering*Edited by Robert Pecora 1985. Plenum Press New York*Foundations of Colloid Science*Written by Robert J. Hunter 1987 Clarendon Press Oxford- J.W Goodman,
*Some Fundamental Properties of Speckle*, JOSA, Vol. 66, Issue 11, pp. 1145-1150 (1976)

## Outside Links

## Contributors

- Ben Nail (University of California Davis Chemistry Department)