  The energy loss of heavy quarks in a quark-gluon plasma of finite size is
studied within the light-cone integral approach. A simple analytical
formulation of the radiative energy loss of heavy quarks is derived. This
provides a convenient way to quantitatively estimate the quark energy loss. Our
results show that if the energy of a heavy quark is much larger than its mass,
the radiative energy loss approaches the radiative energy loss of light quarks.
