Physics (AS & A Level) · May / June 2016 · Paper 42 · Question 12
9702
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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. 0 intensity wavelength Fig. 12.1
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12(a)(i)[3]
(X–ray) photon produced when electron/charged particle is stopped/accelerated (suddenly) range of accelerations (in target) hence distribution of wavelengths [3]
12(a)(ii)[2]
electron gives all its energy to one photon electron stopped in single collision [2]
12(a)(iii)[1]
de-excitation of (orbital) electrons in target/anode/metal [1]
12(b)(i)[1]
aluminium sheet/filter/foil (placed in beam from tube) [1]
12(b)(ii)[1]
(long wavelength X-rays) do not pass through the body [1]
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