- #1
johnroberts
- 4
- 0
Homework Statement
I know that in free space, the width of a Gaussian beam can be written as [itex]W=W_0\sqrt{1+(\frac{z}{z_0})^{2}}[/itex]. However, I was wondering if it was possible to express this width as a function of refractive index instead (since I don't believe a Gaussian beam originating in say, glass, will diverge in the same manner as one in air). Anyone have any ideas?
Homework Equations
[itex]W=W_0\sqrt{1+(\frac{z}{z_0})^{2}}[/itex]