In a parallel–plate capacitor, the plates are kept vertical. The upper half of the space…

In a parallel–plate capacitor, the plates are kept vertical. The upper half of the space between the plates is filled with a dielectric with dielectric constant K and the lower half with a dielectric with dielectric constant 2K. The ratio of the charge density on the upper half of the plates to the charge density on the lower half of the plates will be equal to