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Iodine-131 emits gamma radiation and one other radiation type. Its narrow beam enters a magnetic field directed into the page.
In Fig. 10.1, mark one gamma-radiation path with γ.
Iodine-131 emits gamma radiation and one other radiation type. Its narrow beam enters a magnetic field directed into the page.
Fig. 10.1
In Fig. 10.1, mark one gamma-radiation path with γ.
[1 mark]
(a)(ii)
Determine iodine-131’s other radiation type from the paths in Fig. 10.1 and the magnetic-field direction. Explain your reasoning.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[4 marks]
(a)(iii)
The beam shown in Fig. 10.1 strikes a 5 mm sheet of lead. State what happens to both radiation types.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[2 marks]
(b)
Gamma radiation has frequency 8.8 × 10¹⁹ Hz and speed 3.0 × 10⁸ m/s in vacuum. Calculate its wavelength.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[2 marks]
5054/22/O/N/23Cambridge O Level Physics 5054 · Oct/Nov 2023 · Paper 2 variant 2 · Question 10