- #1

Niles

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## Homework Statement

Hi guys

The setup is the following: I have a

**parallel**beam of X-rays that impart of a mirror. The idea is that the X-rays are refracted to hit a point A. I think pictures of the setup will help greatly, and will minimize the chance of confusion. In picture A we are looking at the setup from above: The mirror is tilted in two ways: First with respect to the axis perpendicular to the picture (the circle with a dot inside - we call this angle α), and then with respect to an axis horizontal to the plane (we call this angle β).

My problem is that I cannot find the angle β, such that the X-rays hit the point A. I know that α has to be 2 times the scattering angle.

Do you have any suggestions on how to find β? Needless to say, we need to find β as a function of the X-ray wavelength, but I am not quite sure where to start.Niles.