There's always some background radiation. There's ionizing radiation around -- trace amounts of radioactive substances decaying, cosmic rays penetrating the atmosphere, etc.
Geiger counter was invented by the Hans Geiger in 1908.
The Geiger counter clicked as it checked for radiation.
This device is called a Geiger Counter, or sometimes a Geiger-Muller counter, which measures alpha particle concentration. It was developed by Hans Geiger and Walther Muller in the early 1900's.
According to the Britannica Concise Encyclopedia, the Geiger counter was invented by Hans Geiger. For more information, see the Related Link.
A device generically called a Radiac, however there are dozens of different kinds of Radiacs which operate by different principles and measure different things. Some are:geiger-mueller counterrate meterionization chamber meterscintillation counterelectrometer dosimeterionization chamber dosimeterphotographic film dosimeter
background radiation
Geiger counter was created in 1908.
The Geiger Counter was developed by Hans Geiger.
Geiger counter was invented by the Hans Geiger in 1908.
The Geiger counter clicked as it checked for radiation.
the geiger counter
created the geiger counter
Levels of radioactivity are measured by a Geiger counter. Hans Geiger and Walter Muller created a practical radiation counter in 1928.
A geiger counter is a measuring instrument, not a measure.
This device is called a Geiger Counter, or sometimes a Geiger-Muller counter, which measures alpha particle concentration. It was developed by Hans Geiger and Walther Muller in the early 1900's.
The Geiger counter was originally invented by Hans Geiger. The Geiger counter is a device that measures the relative radioactivity of a sample.
A Geiger counter, also called a Geigerâ??Müller counter, is used for measuring ionizing radiation. A Geiger counter detects alpha particles, beta particles and gamma rays.