
$$\eqalign{
{\rm KE_{\rm max} } \thinspace &= \thinspace \thinspace {\rm EPE} \cr
      &= \thinspace q * {\Delta V} \cr
} $$

$$
E \thinspace = \thinspace h \nu
$$

$$
e V_0 \thinspace = \thinspace h \nu \thinspace - \thinspace P
$$
  

\bye
