Question

overhead projectors are used in classroom true or false
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Answer 1

Answer:

true

Explanation:

overhead projectors are used in classroom - TRUE

Answer 2

Overhead projectors are used in classroom.  - True.

• Like a film or slide projector, an overhead projector (commonly shortened to OHP) utilizes light to project an enlarged image on a screen, allowing a large audience to see a small document or picture.
• The image source in an overhead projector is a page-sized sheet of transparent plastic film (sometimes known as "foils" or "transparencies") containing either a printed or hand-written/drawn picture to be projected. These are mounted on the projector's glass platen, which has a light source underneath it and a projecting mirror and lens assembly above it (hence, "overhead"). Prior to the introduction of video projectors, they were widely employed in education and business.