Protons
Neutrons
Photons
None of these
A Geiger counter ( also known as a Geiger–Müller counter or G-M counter) is an electronic instrument used for detecting and measuring ionizing radiation. It is widely used in applications such as radiation dosimetry, radiological protection, experimental physics and the nuclear industry.
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Geiger counters are widely used to detect gamma radiation and X-rays, collectively known as photons, and for this the windowless tube is used. However, detection efficiency is low compared to alpha and beta particles.
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