CAPE Physics Unit 2 · 2003 · Paper 2 · Question 8(b)(i)
Sodium has a work function of 2.2 eV.
Find its threshold wavelength.
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Practise this questionOther parts of this question
- 8(a)(i)Explain what is meant by wave-particle duality.[2 marks]
- 8(a)(ii)Explain what is meant by de-Broglie hypothesis.[3 marks]
- 8(a)(iii)Explain what is meant by the photoelectric effect.[3 marks]
- 8(b)(ii)Find the maximum energy of the photoelectrons when the metal is illuminated by light of wavelength 4 x 10^-7 m.[3 marks]
- 8(b)(iii)Find the stopping potential.[2 marks]
- 8(c)Explain whether or not red light will cause electrons to be emitted from sodium in (b).[5 marks]
More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers