Overhead projector in a classroom. Overhead projectors (OHPs) are used to project information from acetate sheets onto a wall or screen. A light in th

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Overhead projector in a classroom. Overhead projectors (OHPs) are used to project information from acetate sheets onto a wall or screen. A light in the base of the projector (bottom) illuminates the information, which is transmitted to the screen by lenses in the projector's head (top).

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Size: 3587px × 4923px
Photo credit: © MARTIN RIEDL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: aid, class, classroom, device, educating, education, equipment, illuminating, lamp, lesson, light, ohp, overhead, projecting, projector, school, teaching, technological, technology