Physics 2, Lab 2

Physics 2, Lab 2 - Lab 2 Diffraction and Interference...

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Lab 2 Diffraction and Interference Joshua Budhu Section: W 11-12:50 Lab Partner: Andrew Nouri Date Performed: 2/11/09 Date Due: 2/25/09
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OBJECTIVE The purpose of this laboratory experiment is to observe the diffraction pattern of a single slit and the interference pattern from two closely-spaced slits (of various widths and separations) resulting from a laser beam. In particular, it is important to understand the physical phenomena by Huygens' principle. THEORY The basis of this experiment concerns the Huygens' Principle. Physicist Christiann Huygens believes that light behaves both like waves and particles. It accounts for the diffraction and interference shown in this lab. For example, in a double-slit slide, each slit is seen as emitting one wave that interferes with the waves coming from the other and creates the interference pattern. The alternating bright and dark spots are respectively constructive and destructive interferences. A laser (a highly concentrated and bright light source) is used so that the wave entering the slits are relatively planar and consider to be
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Physics 2, Lab 2 - Lab 2 Diffraction and Interference...

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