Infared cameras.
infrared imagery
Infrared radiation.
infrared imagery
muscle fibers produce and conduct their own impulses and their conducting of impulses result in voltage differences that can be detected by electrodes.
by comparinig the xmit line to the recieve line and look for differences
If the smoke is not enough to be detected visually, it can be detected by infra-red (heat sensors).
Breezes are created when there are specific heat differences between land and ocean.
Temperature is an indicator of heat or cold. Cold is the absence of heat.
Heat is a form of energy... noticeable only by the temperature differences
By the total number of molocules moving together at a fast rate on us
heat
the higher the wattage is the hotter it gets