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The photograph shows the security check-in at an airport - Edexcel - GCSE Physics - Question 3 - 2014 - Paper 1
Question 3
The photograph shows the security check-in at an airport. An X-ray machine is used to scan luggage for dangerous items. A metal detector is used to check people for... show full transcript
Worked Solution & Example Answer:The photograph shows the security check-in at an airport - Edexcel - GCSE Physics - Question 3 - 2014 - Paper 1
Step 1
Suggest why people are not scanned with X-rays in an airport but have X-rays in a hospital.
Answer
People are not scanned with X-rays in an airport primarily because of health concerns. X-rays can be harmful to health and have the potential to damage or mutate cells, leading to possible cancer risks. The use of X-rays in hospitals is considered essential for diagnostic purposes, where the benefits of diagnosing medical conditions outweigh the associated risks, particularly when the exposure is controlled and limited.
Step 2
Explain how the security people work near the X-ray machine are protected from the X-rays.
Answer
The security personnel are protected from X-rays by using lead shielding or metal casings around the X-ray machine. This shielding absorbs X-rays, significantly reducing their intensity before they can reach the workers. Additionally, the design of the machine keeps the operators at a safe distance, further reducing their exposure to radiation.