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Catelli, Francisco; Giovannini, Odilon; Bolzan, Vicente Dall Agnol – Physics Education, 2011
The interference fringes produced by a diffraction grating illuminated with radiation from a TV remote control and a red laser beam are, simultaneously, captured by a digital camera. Based on an image with two interference patterns, an estimate of the infrared radiation wavelength emitted by a TV remote control is made. (Contains 4 figures.)
Descriptors: Photography, Physics, Radiation, Television
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Velasco, S.; White, J. A.; Roman, F. L. – Physics Teacher, 2010
The effect of density inversion on the convective flow of water in a spherical glass flask cooled with the help of an ice-water bath is shown. The experiment was carried out by temperature measurements (cooling curves) taken at three different heights along the vertical diameter of the flask. Flows inside the flask are visualized by seeding the…
Descriptors: Scientific Concepts, Evaluation Methods, Visual Stimuli, Hands on Science