The equation for the power emitted by a laser beam at a distance in a circle of radius r at a distance z where the beam diameter is w(z) is $$P(r,z)=\frac{1}{2}\pi I_0w_0^2\left(1-e^{-2r^2/w^...
posted 9y ago by HDE 226868 · last activity 8y ago by HDE 226868
