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Spectre magnétique - [Apprendre en ligne]
Spectre magnétique
Limaille dans un champ magnétique

Spectre magnétique révélé par de la limaille de fer

Article mis en ligne le 7 janvier 2017

Sprinkling iron filings on a sheet of paper and bringing a magnet up close to the underside of the paper, we can see that the filings line up along the lines of force of the magnetic field, thus showing its contours.