[" A parallel plate capacitor with air between the plates has a "],[" capacitance of "9" pF.The separation between its plates is d."],[" The space between the plates is now filled with two "],[" dielectrics.One of the dielecrics has dielctric constant "],[K_(1)=3" and thickness d/3while the other one has dielectric "],[" constant "K_(2)=6" and thickness "2d/3." Capacitance of the "],[" capacitor is now "tan((pi)/(2)pi)(pi)/(4)pi(pi)/(4)pi]