Visualizing Magnetic Fields in 3-D
Magnetic (and electric) fields are often challenging to teach and understand because they exist in three dimensions. Typical introductory science textbooks will usually present only 2-D images, and one of the first experiences children have with magnets usually involves dropping iron filings over a 2-D paper sheet placed on top of a bar magnet. More adventurous teachers might encourage their students to see the 3-D fields by directly dipping a strong magnet into the iron fili
