9702/42/O/N/17: (a) A metal surface is illuminated with light of a single wavelength λ. On Fig. 10.1, sketch the variation with λ of the maximum kinetic energy EMAX of the electrons emitted from the surface. On your graph mark, with the symbol λ0 , the threshold wavelength.
(b) A neutron is moving in a straight line with momentum p. The de Broglie wavelength associated with this neutron is λ. On Fig. 10.2, sketch the variation with momentum p of the de Broglie wavelength λ.
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