Chapter 4, Problem 58P

(a)

To determine

The expression for the electric field $E_1$ and $E_2$ in terms of ${\epsilon }_1$, ${\epsilon }_2$, $V$ and the indicated dimensions of the capacitor.

(b)

To determine

The energy stored in both the dielectric layers and the expression for $C$.

(c)

To determine

The prove that expression for $C$ is given by the equation (4.136).