What was César Lattes' primary research tool?
Photographic plates
Geiger counter
Spectrometer
Oscilloscope
Answer
Photographic plates were César Lattes' primary research tool. He used them to detect and study cosmic rays, which are high-energy particles that originate from outside the Earth's atmosphere. Lattes' work with photographic plates led to the discovery of the pion, a subatomic particle that is involved in the strong nuclear force.
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