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Physics Module 3 revision

1. Medical applications of Physics
1.1 X-rays
They are an electromagnetic wave with high frequency and an
extremely short wavelength(of the same order of magnitude
as the diameter of an atom)
X-rays are useful because they are absorbed by metal and
bone, but transmitted by metal…

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o X-rays are focussed on the cancerous areas and a high
dose is fired at the tumour
o As the dose is concentrated on one area it reduces the
chance of healthy cells being ionised


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