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Direct linkRibeiro, Jair Lúcio Prados – Physics Teacher, 2015
If an object is conveniently located in front of two plane mirrors placed at an angle, an observer can see a superposition of images that results in a face with three eyes, called in this text a "triclops." The conditions of occurrence of such an image may seem trivial, but this is incorrect: rather, the correct interpretation of this…
Descriptors: Plane Geometry, Science Education, Educational Practices, Science Instruction
Peer reviewedRand, Roger – Mathematics Teacher, 1972
Descriptors: Instruction, Mathematics, Plane Geometry, Secondary School Mathematics
