Quelpr
3 marksParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2013 · Paper 2 · Question 3(d)

The light source in Part (c) is used in a photoemission experiment with a metal of work function Φ = 4.6 eV.

Calculate the maximum velocity of the electrons ejected from the surface.

The mark scheme is shown once you've answered.

Practise this question

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(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]
  5. 3(e)(ii)From the graph determine the cut-off wavelength for Caesium.[1 mark]

More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers