Question 311General Subjects - 1st Asst/Chief

The correct answer is B) Infrared energy. Thermal imagers, also known as infrared cameras, detect the infrared radiation emitted by objects, which is a form of electromagnetic radiation with wavelengths longer than visible light. This infrared energy is produced by the thermal vibrations of the atoms and molecules within the object's surface, and it is directly related to the object's temperature. The thermal signature radiating from the object's surface is therefore a result of the infrared energy emitted by the object. The other answer choices are incorrect because visible light energy, X-ray energy, and ultraviolet energy are not the primary forms of energy detected by thermal imagers for the purpose of thermographic analysis.