CAPE Physics Unit 2 · 2003 · Paper 1 · Question 7(a)
State THREE experimental facts about the photoelectric effect which support the particulate (photon) model of light.
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- 7(b)When ultraviolet light is incident on an insulated metal plate, the plate emits electrons for a while and then stops. Explain why the process eventually stops.[1 mark]
- 7(c)(i)Determine the amount of energy it will take to ionize an electron from the ground state.[1 mark]
- 7(c)(ii)State what will happen if a 6 eV photon strikes the atom.[1 mark]
- 7(d)(i)Calculate the frequency of radiation emitted.[2 marks]
- 7(d)(ii)Calculate the wavelength of radiation emitted.[1 mark]
- 7(d)(iii)In which region of the electromagnetic spectrum would this radiation be found?[1 mark]
More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers