GCSE Physics Revision: Atomic Physics Extended theory paper

Nuclear Physics

(a) Radioactive sodium has a nuclide represented by the symbol 


Complete the equation below to show how this nuclide decays with the emission of a β-particle.


(b) The figure below shows a narrow beam of β-particles entering an electric field created by two charged plates.

Atomic Physics 1

         (i) Complete the path of the β-particles, starting from the point P.
         (ii) Explain any change of direction which you have shown.

(c) (i) In the space below, draw a labeled diagram of an arrangement, using a radioactive source which emits β-particles, for finding the variation in thickness of a sheet of paper.

     (ii) State the readings which need to be taken and how they would be used to decide whether or not the thickness of the paper varies.