(a)[3]
A metal surface is exposed to light of one wavelength $\lambda$. On Fig. 10.1, sketch how the maximum kinetic energy $E_{\text{MAX}}$ of the electrons emitted from the surface varies with $\lambda$. On your sketch, label the threshold wavelength with the symbol $\lambda_0$.
(b)[2]
A neutron travels in a straight line with momentum $p$. The de Broglie wavelength associated with this neutron is $\lambda$. On Fig. 10.2, sketch how the de Broglie wavelength $\lambda$ varies with momentum $p$.