A parallel plate capacitor is filled equally(half) with two dielectrics of dielectric constants ${\varepsilon _1}$ and ${\varepsilon _2}$ , as shown in figures. The distance between the plates is d and area of each plate is A. If capacitance in first configuration and second configuration are ${{\rm{C}}_1}$ and ${{\rm{C}}_2}$ respectively, then $\frac{{{C_1}}}{{{C_2}}}$ is
First Configuration Second Configuration