Articles on Magnetic fields

Displaying 21 - 32 of 32 articles

The many colours of visible light just part of what James Clerk Maxwell’s theory was to explain. Flickr/laura peta

Let there be light! Celebrating the theory of electromagnetism

It’s hard to imagine life without mobile phones, radio and television. Yet the discovery of the electromagnetic waves that underpin such technologies grew out of an abstract theory that’s 150 years old…
Faster than a plane? Alex Needham

Can magnetically levitating trains run at 3,000km/h?

Trains that use magnets to levitate above the tracks might sound like something from Back to the Future, but the concept of magnetic levitation has been around for many years. Maglev trains, which use…

Monarch butterflies navigate using magnetism

Monarch butterflies navigate using a light-dependent magnetic compass. Patrick Guerra from University of Massachusetts Medical…
Baby salmon: TomTom not required. Tom Quinn and Richard Bell

Magnetic maps guide young salmon from river to sea

How does a young animal find its way to an unfamiliar location hundreds or thousands of kilometres from where it was born? A reasonable idea might be to find an older, experienced migrant and follow. This…
How will Earth weather solar storms while the sun flips its magnetic field? NASA Goddard Photo and Video

A solar magnetic reversal means there’s no need to flip out – yet

You may have read the sun’s magnetic field is heading for a change in field polarity - meaning it will flip upside down - and could have ripple effects throughout the entire solar system. So what does…
Get to grips with the latest development in cosmic couture. NASA

Our new antimatter belt … all the rage in 2011

In the past week, many media outlets have reported the discovery of an antimatter “belt” circling the earth. A range of potential uses for this belt have already been floated – perhaps the most exciting…

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