How does thermal imaging differ from image intensification in NVGs?

Thermal imaging operates by detecting infrared radiation, which is heat emitted by objects, instead of relying on visible light. This allows thermal imaging to form images based on temperature differences in the environment, making it highly effective in total darkness or challenging conditions such as smoke or fog. As a result, objects that are not visible to the naked eye can be detected due to their heat signature.

On the other hand, image intensification, which is the technology used in night vision goggles, amplifies ambient light—e.g., starlight or moonlight—to enhance visibility in low-light conditions. It works by converting the available light into electrons and then amplifying them to produce a clearer image in darkness.

Thus, the essential distinction lies in the mechanisms each technology employs: thermal imaging focuses on the heat emitted by objects, while image intensification enhances light levels to create a visible image. This fundamental difference underpins why the first statement is accurate and represents the key operational principle of both technologies.