Torque

Torque

A new property of light, called ‘self-torque’ was recently discovered. You can read about it here:

https://phys.org/news/2019-06-property.html

And the actual paper here:
https://sci-hub.se/10.1126/science.aaw9486

It is a really interesting discovery working with the properties of orbital angular momentum which itself wasn’t really understood until 1992 ( see https://sci-hub.se/https://doi.org/10.1103/PhysRevA.45.8185).

Of course car people everywhere are wondering if light has torque, it must have horsepower! Sadly the power ( dE/dt ) is based on E=hv, so no light cycles to ride just yet.

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