If the length of the minor axis of ellipse is equal to half of the distance between the foci, then the eccentricity of the ellipse is :\\
(1) $\frac { \sqrt { 5 } } { 3 }$\\
(2) $\frac { \sqrt { 3 } } { 2 }$\\
(3) $\frac { 1 } { \sqrt { 3 } }$\\
(4) $\frac { 2 } { \sqrt { 5 } }$