Posted on July 8, 2015
On this date in 1894, Pyotr Leonidovich Kapitsa was born in Russia. He grew up to become a physicist, and in 1937, he discovered that helium becomes a superfluid in low temperatures.
Kapitsa ended up winning a Nobel Prize in physics for his discovery.
The next year on this date, 1895, Igor Yevgenyevich Tamm was born in Russia. He discovered, along with a man named Cherenkov, that there is a faint blue glow emitted when a charged particle passes through a liquid (or other material) faster than light travels through that liquid (or other material).
Tamm ended up winning a Nobel Prize in physics for his work, too.
Nice coincidence, eh?
|Superfluid helium seems to defy gravity.|
It climbs up the walls of its container
and then drips down and out of the
container. It can even create a fountain
|As the fast-moving particle travels through a fluid,|
it leaves behind an expanding "cone" of disturbance
in the fluid's electromagnetic field. Of course,
a disturbance in an electromagnetic field is light.
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