L’interference ou la superpostion est une propriete des ondes. Le fait que la lumiere manifestait une interference a prouve d’une maniere indiscutable que la lumiere se propage par ondes: interference des l’eau; experience des fentes jumelles de Young; couleur de films-savon; lumiere coherente et incoherente; les anneaux de Newton; utilisation des anneaux de Newton dans lepolissage du verre; films fins; couche sur les lentilles; lecture de disques compacts.
Subjects: Physics
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Interference of Light
Clear, inspiring visuals and animations. Topics include interference of waves in water; Young’s twin slit experiment; color of soap films; coherent and incoherent light; Newton’s rings; thin films; coatings on lenses; reading compact discs.
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Gravity – History of ideas
Follow the path of the ancient Greeks, Renaissance Europeans and British in their search for an understanding of the properties of the universe. From the simple versions of Geocentric models to the more complex versions offered by Ptolemy, the early version of Heliocentric model to the more modern version. This video uses stage actors and animation to illustrate the conception and progression of the models of the following philosophers: Plato, Eudoxus, Aristotle, Aristarchus, Ptolemy, Copernicus, Tycho Brahe, Kepler, Galileo, and Newton.
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Power Lines and Transformers
How electricity is distributed from power stations to the end user. Topics discussed are line loss, transformers – how they reduce line loss, the high voltage network, connecting the user and the purchasing of power.
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Electricity – How it works
Topics include static electricity, electrons moving in a wire, circuits, electron pumps, electromagnetism, chemical change, physical movement, and how we measure electricity.
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Electromagnetic Induction
Topics include magnets inducing electron flows, solenoids, generators, alternators, transformers, Lenz’s law, induction coils, back EMF, eddy currents, generators and motors. Part II of Electromagnetism.
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Electromagnetisme
Ce video montre comment l’exploitation des principes de l’electromagnetisme est essentielle pour notre mode de vie moderne. Il examine les experiences historiques, explique les concepts et illustre leur application dans une large gamme d’inventions.
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Electromagnetism Part I
Topics include electric fields, moving charges produce EM fields, fields around conductors, solenoids, Earth, atomic magnets, Para magnetism, curie point, motor effect, deflection of electron beam TV, Interacting fields, magnetic force balance, torque on a coil, galvanometer, and motors.
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Cutting Metal
This program considers a wide range of methods currently in use in industry. The following processes are featured and include some excellent footage of these processes together with relevant explanations: CNC Oxy cutting, circular saw, CNC drilling machine, angle grinder, shearing devices,lathe operations, laser cutting, water jet cutting, and spark erosion. This program is highly recommended for students of metals and engineering at both school and tertiary levels.
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Collisions
This classic is one of our most popular and enduring videos, showing a collection of the world’s most spectacular and beautiful collisions analyzed in terms of energy, force, momentum and vectors. We feature collisions between cars, trucks, planes, meteorites and people. These can be frozen on screen for analysis. Guaranteed to keep rowdy students attentive.