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1 markParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2013 · Paper 2 · Question 3(e)(ii)

Table 2 gives stopping potential Vs and wavelength λ for Caesium.

From the graph determine the cut-off wavelength for Caesium.

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Other parts of this question

  1. 3(a)Describe the phenomenon of 'photoelectric emission'.[3 marks]
  2. 3(b)Identify the property of a light source that would make it suitable for a demonstration of this phenomenon and give a reason why this property makes it…[2 marks]
  3. 3(c)Calculate the energy (in eV) of a light photon of wavelength 200 nm.[3 marks]
  4. 3(d)Calculate the maximum velocity of the electrons ejected from the surface.[3 marks]
  5. 3(e)(i)On the grid provided, plot a graph of V_s against λ. Ensure that the λ scale extends to 550 nm.[3 marks]

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