CAIE IGCSE Physics 3.3.4 Harm From Excessive Em Radiation a Questions

Practise linking excessive electromagnetic exposure to the affected tissue and select shielding, distance or exposure-time precautions appropriate to the source.

Exam points

Link escaping microwaves to internal heating and a closed screened oven door; link X-ray exposure to cell or DNA damage, mutation and cancer risk; justify lead shielding, distance and shorter exposure by reducing absorbed dose.

[Maximum number: 1]

X-rays are electromagnetic waves. Fig. 6.1 shows the position of X-rays in the electromagnetic spectrum arranged according to increasing wavelength.

Fig. 6.1

State one reason why it is necessary to take safety precautions when X -rays are used.
[Total: 10]

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CAIE IGCSE Physics 3.3.4 Harm From Excessive Em Radiation a Questions question 1