Some Applications of Fourier's Great Discovery for Beginners

Autor/in	Kraftmakher, Yaakov
Titel	Some Applications of Fourier's Great Discovery for Beginners
Quelle	In: European Journal of Physics, 33 (2012) 5, S.1249-1258 (10 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0143-0807
DOI	10.1088/0143-0807/33/5/1249
Schlagwörter	Undergraduate Study; Science Laboratories; Science Activities; Engineering Education; Science Instruction; Scientific Principles; College Science; Energy; Laboratory Equipment; Light + Suchen Sie Ihr Suchwort? Grundstudium; Ingenieurausbildung; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Energie; Laborausstattung; Licht
Abstract	Nearly two centuries ago, Fourier discovered that any periodic function of period T can be presented as a sum of sine waveforms of frequencies equal to an integer times the fundamental frequency [omega] = 2[pi]/T (Fourier's series). It is impossible to overestimate the importance of Fourier's discovery, and all physics or engineering students should be familiar with this subject. A suitable device for demonstrating spectra of electrical signals is a digital storage oscilloscope. Spectra of various waveforms and of AM and FM signals are demonstrated, as well as AM signals from a broadcasting station. Changes in the signals filtered by frequency-selective circuits are seen by comparing the spectra of the input and output voltages. All the experiments are suitable for undergraduate laboratories and usable as classroom demonstrations. (Contains 6 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10