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4 marksParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2004 · Paper 2 · Question 8(b)(i)

Figure 8 shows the x-ray spectrum of a molybdenum target (Z = 42) bombarded with 35 keV electrons, with K_β and K_α wavelengths of 63.0 × 10^-12 m and 70.0 × 10^-12 m respectively.

Calculate the photon energies corresponding to K_β and K_α in eV.

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Other parts of this question

  1. 8(a)(i)Explain the term: Continuous x-ray spectrum.[3 marks]
  2. 8(a)(ii)Explain the term: Characteristic x-ray spectrum.[3 marks]
  3. 8(a)(iii)Explain the term: Cut-off wavelength.[2 marks]
  4. 8(b)(ii)Determine which substance from the table could be used as a filter to absorb the K_β line much more strongly than the K_α line, and explain your answer.[4 marks]
  5. 8(b)(iii)Calculate the cut-off wavelength in picometers for molybdenum.[4 marks]

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