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Unformatted text preview: PHY251  Scattering PHY 251 Scattering Introduction The purpose of this laboratory is to show how certain characteristics of an object can be determined from the distribution of particles (or radiation) scattered from the object. In particular, we will use the scattering of a beam of laser light to indirectly measure the radius of several plexiglass cylinders. The method is similar in principle to that used in particle beam experiments to determine the size and shape of target nuclei. Measurement Method Imagine a wellcollimated beam of light striking a polished circular cylinder as shown in the Figure. R is the cylinder radius, and b is the ``impact parameter'', i.e. the distance between beam and the parallel line passing through the center of the target. After striking the target, the beam is reflected such that the angle of reflection, , equals the angle of incidence. From geometry it follows that sin = b R . Defining the scattering angle =  2 , we find that = (...
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This lab report was uploaded on 02/05/2008 for the course PHY 251 taught by Professor Rijssenbeek during the Fall '01 term at SUNY Stony Brook.
 Fall '01
 Rijssenbeek
 Physics, Radiation

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