Category:1939 in physics
Science: Astronomy · Biology · Geography · Geology · Mathematics · Medicine · Paleontology · Physics ·
Media in category "1939 in physics"
The following 2 files are in this category, out of 2 total.
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Joseph Hamilton with radio sodium experiment 97401413.jpeg 2,998 × 3,999; 6.69 MB
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Robert Marshak drinking radiosodium.jpg 640 × 857; 51 KB