CAPE Physics Unit 2 · 2018 · Paper 2 · Question 6(b)(ii)
Define cut-off wavelength and state its unit of measurement.
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- 6(a)Describe the phenomenon of photoelectric emission.[3 marks]
- 6(b)(i)Define work function and state its unit of measurement.[3 marks]
- 6(c)(i)Light of wavelength λ is incident on a polished metal surface. Derive an expression for the maximum speed of the photoelectrons ejected.[4 marks]
- 6(c)(ii)Calculate the maximum speed of the ejected photoelectron when λ = 100 nm, if the metal is tin and has a work function of 5.5 eV.[3 marks]
More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers