When light of various frequencies is incident on the metal cathode of a photocell,
photoelectrons are emitted from the surface of the cathode.
The graph below shows the relationship between the maximum kinetic energy (Ek(max))
of an emitted photoelectron and the wavelength of the incident light.
10.1 Use the graph to determine the maximum kinetic energy of the emitted
photoelectron when the wavelength of the incident light is 1,0 x 10-7 m. (1)
10.2 What relationship between the maximum kinetic energy of the emitted
photoelectron and the wavelength of the incident light can be deduced from
the graph? (2)
10.3 Define the term work function in words. (2)
10.4 Use the graph to calculate the work function of the metal used as cathode of
this photocell. (4)
10.5 Calculate the maximum kinetic energy of the emitted photoelectron when the
wavelength of the incident light is 0,5 x 10-7 m. (4)
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TOTAL: 150