Recent content by Snoopey

Hi all, I'm looking for an equation which will give me the focal length of a biconvex lens given that we know both Radii of curvature, the thickness of the lens and the refractive index inside and outside. An equation is given on wikipedia here http://en.wikipedia.org/wiki/Focal_length as I...

Brilliant! Thank you for this, not sure why I didn't think of splitting into the different compenents :) edit: For anyone interested I simplified the end result into [SIZE="5"]d= \frac{\vec{n}.(\vec{x_{0}}-\vec{a})}{\vec{n}.\vec{l}}

Hi all, I am a little stuck on a problem I'm trying to solve for something I'm programming. I'm trying to find the point at which a line meets a plane. The line is defined as \vec{x} = \vec{a}+d\vec{l} where \vec{a} is a point on the line, \vec{l} is a unit vector defining the direction of...

I actually have this exact same problem and I'm stuck in exactly the same places.

Aha thanks! Somehow I totally missed being able to combine the two powers of e, I guess I was staring at the problem for too long.

Homework Statement I've been given the following function: g(x) = \frac{\gamma}{2}e^{-\gamma \left|x\right|} with \gamma>0 First thing I needed to do was to prove \int^{-\infty}_{\infty}g(x)dx=1 which was simple enough. I hit a problem when trying to find the Fourier transform...