At time \(t=0\), an LC oscillator begins to oscillate when the capacitor has its maximum charge. Assume the resistance to be zero in the circuit. If \(L=30 \mathrm{mH}\) and \(C=2.5 \mu \mathrm{F}\), find the first time at which the electromagnetic energy of the oscillator is shared equally between the corresponding fields of the capacitor and the inductor.