Medical News
Space
10 May 2019
Magnetism, how does it work?Giulio Ercolani / Alamy Stock Photo
By Chelsea WhyteThe magnetism of the entire universe is 2.5 billion times weaker than a fridge magnet, according to a new analysis.
“The magnetic field is weak by that standard, but it’s a lot of energy. There’s as much energy in the Milky Way in magnetism as there is in starlight,” says Bryan Gaensler at the University of Toronto in Canada.
As light passes through a magnetic field, the Faraday effect causes the light’s orientation, or polarisation, to rotate. Gaensler and his colleagues used this …
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