A) Geiger counter
B) Polarimeter
C) Calorimeter
D) Radiometer
Correct Answer: A
Solution :
A Geiger counter is an instrument that measures ionizing radiation such as alpha particles, beta particles, or gamma rays using the ionization effect produced in a Geiger-Muller tube; which gives its name to the instrument. It is used widely in applications such as radiation dosimetry, radiological protection, experimental physics and the nuclear industry.
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