'Developed by a German physicist, it measures radioactivity by "counting" ionizing particles like protons'
a Geiger counter
NOW THAT'S INVENTIVE!: Developed by a German physicist, it measures radioactivity by counting ionizing particles like protons
Developed by a German physicist, it measures radioactivity by "counting" ionizing particles like protons
Developed by a German physicist, it measures radioactivity by "counting" ionizing particles like protons
NOW THAT'S INVENTIVE!
a Geiger counter
NOW THAT'S INVENTIVE!