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3 marksParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2005 · Paper 1 · Question 7(a)

Figure IX shows an apparatus for X-ray production using molybdenum as the target metal. Molybdenum's K-shell electrons have an energy of 20 keV and M-shell electrons have 200 eV.

Sketch the typical intensity-wavelength X-ray spectrum for molybdenum, clearly indicating the minimum continuous X-ray wavelength, lambda_min, and the characteristic peaks in intensity.

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Other parts of this question

  1. 7(b)Explain the origin of the characteristic peaks observed in your sketch in (a).[2 marks]
  2. 7(c)One of the K-shell electrons is removed from the atom by electron bombardment and its vacancy is filled by an M-shell electron. Calculate the wavelength of the…[3 marks]
  3. 7(d)The tube is operated from a 25 kV supply. What is the minimum wavelength of the continuous spectrum of X-rays?[2 marks]

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