CAPE Physics Unit 2 · 2013 · Paper 2 · Question 3(c)
Calculate the energy (in eV) of a light photon of wavelength 200 nm.
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- 3(a)Describe the phenomenon of 'photoelectric emission'.[3 marks]
- 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(d)Calculate the maximum velocity of the electrons ejected from the surface.[3 marks]
- 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]
- 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