Projector for Opaque Materials
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Question (English)
Opaque material can be projected through:
- Slide projector
- Filmstrip projector
- Overhead Projector (OHP)
- Epidiascope ✓ Correct
Explanation:
Correct Answer: Epidiascope
The Epidiascope (Opaque projector) is the only projector that can project opaque (non-transparent) materials. It uses reflected light off the surface of the material to project the image onto a screen.
Why Epidiascope for Opaque Materials?
- Opaque materials (books, photographs, postcards, 3D objects) cannot allow light to pass through them.
- The Epidiascope uses a powerful lamp that shines light onto the opaque material, and a mirror/lens system reflects and projects that image.
- Useful for projecting pages from books, drawings, or specimens without making transparencies.
Classification Recap
- Slide & Filmstrip projectors: Direct projection — require transparent slides/strips.
- OHP: Indirect projection — requires transparency/acetate sheets.
- Epidiascope: Reflected projection — projects opaque materials directly.
Memory Tip
Epidiascope = projects Dark/opaque items. Opaque projector = Epidiascope.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Veterinary Extension Education. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
