  The exact energy levels and wave functions of an electron free to move on a
sphere under the radial magnetic field is found. Wave functions are expressed
in terms of Jacobi polynomials which were well-defined and have orthogonality
relation, recurrence relations, series expansions etc. We have also discussed
the the wave functions and energy levels in case of very large magnetic field.
Landau energy levels are shown for strong constant magnetic field occurring on
two-dimensional surfaces, if the radius is very large. The results compared
with those previously found in the literature.
