Short Wave Magnets: The Hidden Objects Powering Your Life
Feb 24, 2021
Geoff Brumfiel, NPR science correspondent, dives into the fascinating world of magnets, explaining their critical role in technology and daily life. He highlights how every device we use likely incorporates a magnet. Brumfiel demystifies the science of magnetic fields, the unique properties of magnetic materials, and the remarkable power of electromagnets. He also shares surprising applications of magnets, from MRI machines to their influence in various sciences, making a compelling case for why magnets deserve our respect.
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Magnetism Basics
- Magnetic fields have north and south poles, attracting opposites and repelling likes.
- Magnetism, coupled with electric fields, forms the fundamental force of electromagnetism.
Stainless Steel Fridge Woes
- Geoff Brumfiel's fridge magnets stopped working after moving to a new house.
- The stainless steel fridge isn't as receptive to magnets.
Electron Spin and Magnetic Fields
- Spinning electrons generate magnetic fields, influenced by their alignment within atoms.
- Permanent magnets' atoms align uniformly, creating a larger magnetic field.