9702/52/O/N/21: A Geiger–Müller (G–M) tube is a device that can detect beta-radiation. A student places paper between a radioactive source emitting beta-radiation and a G–M tube, as shown in Fig. 2.1. The G–M tube is connected to a rate-meter which records the count rate R. The thickness t of the paper is measured in two different places using a micrometer. The student repeats the experiment for different thicknesses of paper.
It is suggested that R and t are related by the equation \(R =R_0 e^{-\mu t} \) where \(R0\) is the count rate without any paper and μ is a constant.
Sample solutions for practical Paper 5 variant 2 Question 2 October/November 2021 Cambridge A Level Physics.
