Optical bench with object screen

Optical bench with object screen

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Using a short focal length 50 mm double convex lens. The wooden optical bench allows for fairly precise experiments in the classroom and consists of a 1.5 meter rail on which carriages are placed against a millimeter scale. The light source is a focused light emitting diode that is bright enough to use a without a blackout. The light is cast onto a white metal object screen of 75mm diameter which has a round aperture with a wire grid. The image is focused by a lens onto a white metal receiving screen which can have a squared paper insert. Mirrors, object needles, diffraction objects and Young's slits can also be used in the setup.

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Keywords: aperture, carriages, comparing, convex, double, emitting diode, experiments, focal length, focus, image, lens, light, needle, object, optical bench, plano, projected, rail, receiving screen, scale, screen, setup, source

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