Experiment angular momentum of light form 1936
I found an interesting paper that may be of interest to others too.
Below is a snip of the apparatus used to measure the angular momentum of light directly. Its fascinating what can be achieved even back in 1936.
I wonder how the torque compares to the torque on a compass needle from the earth's magnetic field.
 
Ref: 
I am wg48 but not on my usual pc hence the temp handle.
Thank goodness for Fleming and the fungi.
Old codger' lives matters, wear a mask and help save them.
Be aware of demagoguery, keep your frontal lobes fully engaged.
I don't know who invented mRNA vaccines but they should get a fancy medal and I hope they made a shed load of money from it.
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