Word: datum
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
...that cosmic ray intensity is less near the Equator than in high latitudes. That seemed to show that the rays were charged particles attracted to the Poles as a compass needle is. Then it was found that more cosmic rays come from the west than from the east. That datum, considered with reference to Earth's magnetic field, made it appear that most of the rays were positively charged protons or positrons...