Respuesta :
A Geiger counter placed 1 meter from a point source of radiation registers 100 counts per minute. if the Geiger counter is moved closer, halfway to the source, the counting rate will be 400 counts per minute.
A Geiger counter is an instrument that uses the ionizing impact of radiations (such as cosmic radiation or particles from radioactive materials) on an enclosed gas to produce a signal that is amplified and sent to a device that produces a visible or audible indicator.
We know, that the intensity of radiation which is counted by the Geiger counter, is inversely proportional to the square of the distance from the source of radiation
i.e No. of radiations registered (Intensity) = [tex]\frac{1}{Distance^{2} }[/tex]
=> [tex]\frac{Intensity_{1} }{Intensity_{2} } = \frac{(distance_{2})^{2} }{(distance_{1})^{2} }[/tex]
=> 1 x 100 = New Count x [tex]0.5^{2}[/tex]
=> New count = 400 count/min
Know more about the Geiger counter here
brainly.com/question/4656321
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