ERIC Number: EJ1131118
Record Type: Journal
Publication Date: 2017-Mar
Abstractor: As Provided
Reference Count: 10
What Is an Image?
Zetie, K. P.
Physics Education, v52 n2 Article 023003 Mar 2017
In basic physics, often in their first year of study of the subject, students meet the concept of an image, for example when using pinhole cameras and finding the position of an image in a mirror. They are also familiar with the term in photography and design, through software which allows image manipulation, even "in-camera" on most Smartphones. But what is meant by the term image? A good, clear definition is not readily available in a range of textbooks I examined, nor on various physics sites, beyond something like "a representation of an object" or "a reproduction of an object formed using a mirror or lens" (or words to those effects). None of this explains why a mirror forms an image and a piece of paper does not, or why a pinhole does, but a large hole does not. In this short paper, these ideas are explored in an investigative way.
Descriptors: Physics, Science Instruction, Scientific Concepts, Laboratory Equipment, Photography, Science Experiments, Light, Optics
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A