Hobbies And Interests
Antennas
Antennas are never polarized completely. There is always some type of interference in the radiation pattern. The goal is to isolate the cross-polarization interference so it can be minimized. Antennas must be measured by recording the incident waves. If the waves deviate from their intended field, the antenna waves may encounter problems and need adjusting. Reflectors can be used to reduce the cross-polarization
Internet
Wireless high-speed Internet signals are also cross-polarized. They send two signals, one vertical and one horizontal. When antennas are not properly aligned, the signal crosses improperly creating interference. This interference is called cross-polarization. When you are working with wireless signals, you want the least cross-polarization possible so your signal is fast and uninterrupted. During installation, interference is tested and antennas are adjusted to prevent cross-polarization.
Light
Light waves are fluctuating electromagnetic waves. Linear polarization occurs if light is only on one plane, such as moving up and down, but polarized light moves through linear light at a different angle. If light bounces through two types of polarization, cross-polarization exists. Polarized light can be created by covering a light source with polarized paper. Your computer screen is a source of polarized light.
Photography
Cross-polarization finds the weaknesses in plastic and glass items. Place a cheap plastic glass in front of a piece of linear polarizing film. Add a circular polarizing filter to your camera lens, get as close as possible to the plastic glass and take a photo. You must have a strong polarized light source, but sunlight works perfectly. Your photo will show the light waves and polarization from the subject of the photo. If you are using a light background, your background will be black. Choose a digital SLR camera with an aperture set at f/11 or smaller. ISO should be 100 and leave your shutter open for three seconds. Use a tripod.