This shows interference patterns from a thin air gap between glass.ĦD30.20 - Thin Film interference (soap film) Show the pattern of a crossed grating using laser light. This demonstration shows what happens to laser light that passes through a diffraction grating.ĦD20.32 - Compact Disk Diffraction and Laserĭemonstrate that a Compact disk can act as a diffraction grating. This demonstration uses a slide with varing number of slits (between 2 and 5). This demonstration shows the double slit interference pattern for laser light. This demo shows that laser light can diffract around an object such as a razor blade or pin head.ĦC20.20 - Thin Wire Diffraction (strand of hair)Ī narrow opaque object will create a diffraction pattern that may be used to measure the width of. Using a variable width slit, you can show what happens to the diffraction pattern when the slit size is varied.ĦC20.10 - Laser and Diffraction (Poisson's Bright Spot) This demonstration shows the diffraction pattern of laser light passing through a single slit. Use to show that radiated color changes with temperature. ĦB40.10 - Light on a Variac (Black body radiation) You can use this to compare the intensity of. This device can be used as a light intensity meter. We have several various cameras, including digital, instant polaroid, and an old film camera to be used as a prop. ![]() This demonstration (often referred to as the reverse pinhole camera) uses a light bulb inside. This demonstration uses an optical bench with two arrows as the light source. This demo projects the filament of a light bulb onto the screen using a plano convex lens. This demonstration shows total internal reflection through a stream of water. These fiber optic devices show how we can exploit total internal reflection to transfer light across. With a small tank of water, you can use a laser beam to show the critical angle. Using the blackboard optics set, you can show the effects of total internal. This demonstration shows the refraction of light from water to air.ĦA44.10 - Blackboard Optics - Total Internal Reflection This demonstration shows what happens to laser light when it encounters an air-water surface. Using the plastic cubes in the blackboard optics set, you can show how. This demonstrates refraction at an air/water surface. This demonstration shows that an object with the same index of refraction as a liquid will. This demonstration visually shows that a mirror can focus Infrared waves at the focal point. This demonstration illustrates the images formed by convex and concave mirrors.ĦA20.60 - Energy at the focal point (ignite gun cotton) This mirage uses two concave mirrors to project an image of the bug in the opening.ĦA20.45 - Large convex and concave mirrors This demo uses three large mirrors which serve to model a kaleidoscope.Ī concave mirror is used to project a real image of a light bulb onto an empty socket. This demonstration illustrates the difference between Diffuse and Specular reflection. This demonstration shows that the angle of incidence is equal to the angle of reflection. This demonstration uses the plane mirror from the blackboard optics set to show how light This demo shows the linear nature of a laser beam by clapping a blackboard eraser near it. ![]() This demonstration illustrates how the speed of light can be measured.ĭemonstrates an umbra and penumbra using both point and extended sources. To view a demo, click on either the image or the number/name. To navigate to a specific category of these demos, use the menu on the left. From Figure 1.3 it follows that the second wave travels a longer distance PN before and NQ after reflection occurs.From this page you can view demos for Optics classes. Since all X-rays are reflected in the same direction, superposition of the scattered rays occurs. In contrast to the lower energy visible light, the X-rays penetrate deep inside the material where additional reflections occur at thousands of consecutive parallel planes. Bragg analysis treats X-rays like visible light being reflected by the surface of a mirror, with the X-rays being specularly reflected at the lattice planes. Parallel planes have the same indices and are equally spaced, separated by the distance d hkl. Lattice planes are crystallographic planes, characterized by the index triplet hkl, the so-called Miller indices. Bragg, 1912), which describes the principle of X-ray diffraction in terms of a reflection of X-rays by sets of lattice planes. The easiest access to the structural information in powder diffraction is via the well-known Bragg equation (W.
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