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8 marksParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2014 · Paper 2 · Question 6(a)

X-ray production, photon energies, and attenuation.

With the aid of a CLEARLY LABELLED diagram, describe the way in which x-rays are usually produced for use in diagnostic medicine and dentistry.

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  1. 6(b)Express the energies of x-ray photons of wavelength 10^{-11}\text{ metres} in electron Volts.[3 marks]
  2. 6(c)The absorption coefficient of x-rays in a hypothetical material is 0.3\text{ cm}^{-1} at the wavelength used in 6(b). What thickness of the material would be…[4 marks]

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