Astronomy and physics education research and comments, field-tested think-pair-share (peer instruction) clicker questions, flashcard questions, in-class activities (lecture-tutorials), current events questions, backwards faded scaffolding laboratories, Hake gains, field-tested multiple-choice and essay exam questions, indices of discrimination, presentation slides, photos, ephemerae, astronomy in the marketplace, unrelated random sketches and minutiae.
20060719
There is a spoon...image!
"The Matrix" (Warner Bros., 1999)
Excerpt from http://www.slate.com/id/2145696/
Physics 8B learning goal Q2.3
Depending on whether the convex or concave side of the spoon is viewed (and for the concave side, whether the object is inside of or outside of the focal point), an upright virtual image or an inverted real image is seen.
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