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Williams, Hollis – Physics Education, 2022
We outline the basic theory behind white light interferometry and the workings of a typical light interferometer microscope. We study WLI images obtained for rough and smooth chrome steel spheres to illustrate the principle that curved rough surfaces can be imaged with such a device as long as the surface roughness is kept within certain limits.
Descriptors: Physics, Science Instruction, Light, Laboratory Equipment
Groff, Jeffrey R. – Physics Teacher, 2012
Bioscience and premedical profession students are a major demographic served by introductory physics courses at many colleges and universities. Exposing these students to biological applications of physical principles will help them to appreciate physics as a useful tool for their future professions. Here I describe an experiment suitable for…
Descriptors: Science Instruction, Optics, Physics, College Science
Rabal, Hector; Cap, Nelly; Trivi, Marcelo – Physics Education, 2011
Imaging of three-dimensional objects by lenses and mirrors is sometimes poorly indicated in textbooks and can be incorrectly drawn. We stress a need to clarify the concept of longitudinal magnification, with simulated images illustrating distortions introduced along the optical axis. We consider all possible positions of the object for both a…
Descriptors: Textbooks, Science Instruction, Physics, Optics
Matteucci, Giorgio – European Journal of Physics, 2011
The Young-Feynman two-hole interferometer is widely used to present electron wave-particle duality and, in particular, the buildup of interference fringes with single electrons. The teaching approach consists of two steps: (i) electrons come through only one hole but diffraction effects are disregarded and (ii) electrons come through both holes…
Descriptors: Teaching Methods, Science Instruction, Laboratory Equipment, Molecular Structure