![]() ![]() ![]() An optional Green Diffraction Laser is also available so that the effect of wavelength on the pattern can be measured. The Diffraction Apparatus requires a Combination 1.2 m Track/Optics Bench individually or part of the Dynamics Cart and Track System. The light sensor is moved by hand over a 150 mm distance, tracing out the diffraction pattern. However, if the slit is small enough, then the wave properties of light become apparent and a diffraction pattern is seen projected onto a screen illuminated by. ![]() Figure 4.2.2 shows a single-slit diffraction pattern. Both the light sensor and position sensor connect to your interface. Diffraction through a Single Slit Light passing through a single slit forms a diffraction pattern somewhat different from those formed by double slits or diffraction gratings, which we discussed in the chapter on interference. Since it is optically based, without gears or racks, it has zero backlash.ĭata collection is performed by choosing a slit, directing the laser through the slit, and choosing an entrance aperture for the light sensor. This position sensor uses a precision optical encoder to measure translation with better than 50-micron resolution. To measure position, the light sensor is mounted on a novel Linear Position Sensor. The light sensor has three ranges, allowing the study of fine details or gross features of patterns. In order to provide excellent spatial resolution, a selectable entrance aperture restricts the width of the pattern viewed by the High Sensitivity Light Sensor. The Linear Position Sensor and High Sensitivity Light Sensor completes the Diffraction Apparatus. In the geometric optics lab you observed light beams by tracing their paths as if they were a stream of individual particles traveling in straight lines. These high-precision slits cast clean diffraction and interference patterns, ideal for quantitative matching of intensity vs. It can be described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Slits are made by depositing metal film on glass, creating extraordinarily clean slits with fully opaque blocking areas. Diffraction is a process that a wave undergoes when it encounters an obstacle with size close to its wavelength (Fig 1). The included Red Diffraction Laser provides a clean monochromatic light source. The Diffraction Apparatus lets students create, view, and measure diffraction and interference patterns. ![]()
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