24.1c Ex1 MJ16 P42 Q12 X-Ray Spectrum and Controls | A2 Medical Physics | CAIE A Level Physics
Example - 9702/42/M/J/16: High-energy electrons collide with a metal target, producing X-ray photons. The variation with wavelength of the intensity of the X-ray beam is illustrated in Fig. 12.1. #9702s16p42 #Lv1 #A2xrayP4
(a) Explain why there is (i) a continuous distribution of wavelengths, (ii) a sharp cut-off at short wavelength, (iii) a series of peaks superimposed on the continuous distribution of wavelengths.
(b) In the X-ray imaging of body structures, longer wavelength photons are frequently filtered out of the X-ray beam.
(i) State how this filtering is achieved
(ii) Suggest the reason for this filtering.
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