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Questions on the Photoelectric Effect

Q9.

(a) Describe what occurs in the photoelectric effect.

[3 marks]

(b) Violet light of wavelength 380 nm is incident on a potassium surface. Deduce whether or not light of this wavelength can cause the photoelectric effect to occur when it is incident on the potassium surface.

Work function of potassium = 2.3 eV

[4 marks]

(c) The photoelectric effect provides evidence for light possessing particle properties. State and explain one piece of evidence that suggests that light also possesses wave properties.

[2 marks]

(Total 9 marks)