Diagram 8 shows the deflection of radioactive radiation by an electrical field.
(a) Name the radioactive radiation P. [1 mark]
(b) Radioactive radiation Q is not deflected by the electrical field.
Give a reason for the observation. [1 mark]
(c) Which radiation has
(i) the highest penetration power?
(ii) the highest ionization power? [2 marks]
(d) Name one example of radioactive substance used in medical field. [2 marks]
Explain its usage.
(a) Radiation P: Beta ray
(b) Radioactive radiation Q is neutral to the electrical field
(c)(i) Gamma rays has highest penetration power
(c)(ii) Alpha ray has highest ionization power
Used to treat cancer