Physics 7408/3BB June 2018

The AQA Paper 3 Physics exam (June 2018), Section B (Medical Physics), covers a range of topics related to medical applications of physics. It includes the workings of optical fibres in endoscopes, calculations of refractive index, and resolution capabilities of the human eye. The paper also explores the advantages of CT scans over traditional X-rays for head injuries, while discussing the appropriate usage of X-rays for other injuries. Additionally, the exam addresses sound intensity levels, safety measures against noise, and the use of high-energy X-rays in cancer treatment. The final section involves calculations related to the mass attenuation coefficient of lead for X-rays.