Frank Oppenheimer was an experimental physicist. And one of the crucial instruments of his era for visualizing the paths of subatomic particles was the BUBBLE CHAMBER.
Invented by Nobel Laureate Physicist Donald Glaser. This device used a superheated transparent liquid like liquid hydrogen that would boil and form a trail of tiny bubbles along the path of a charged particle passing through it.
These tracks could then be photographed and analyzed to understand the fundamental building blocks of matter.
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