Being vertically mounted causes the whip antenna to have vertical polarization.

Depending on the orientation of the antenna mounting, the usual linear cases are horizontal and vertical polarization.

In the case of vertical polarization, there is always a maximum at earth level (left pattern).

This is the reason why almost all public address radio emissions have vertical polarization.

Radars use horizontal, vertical, linear and circular polarization to detect different types of reflections.

Okay, now, here's the part that hurts my head, is that I can understand, the idea of vertical and horizontal polarization.

P-70 radars were dual-channel with the antenna working in both horizontal and vertical polarization.

These are useful for carrying electromagnetic waves that have a horizontal or vertical polarization to them.

We can call the photon at the right 1 and assume that it possesses a vertical polarization.

If the first one measured has a vertical polarization, the second will also be vertical.