lab2 - James Montgomery Physics 326 Section 04 September...

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James Montgomery Physics 326 Section 04 September 29, 2011 Lab 2: Wavelength of Light Introduction: Light is a wave. As such, when two coherent sources interact, they interfere with each other by accentuating the intensity or canceling each other out entirely. If viewed with the properly aligned screen, one can view high intensity (bright) sections and low intens- ity (dim) or non-existent sections where the lights cross. A single light source can be manipulated to achieve the same results as two light sources by use of a diffraction grating. As light passes through the slits of a diffraction grating, it bends around each slit and acts as its own individual source. These new sources then proceed to interfere and produce patterns on screen. For this experiment, a steel ruler was used. The markings on the ruler absorb light at while reflecting light at the unmarked positions. This is essentially the same as a diffraction grating and the res- ults of reflecting a laser off the ruler confirms the idea.
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lab2 - James Montgomery Physics 326 Section 04 September...

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