Outline which electromagnetic waves are used for thermal imaging and night vision?

Thermal imaging and night vision technologies use different parts of the electromagnetic spectrum.

1. Thermal Imaging: Thermal imaging cameras use infrared radiation to capture images. Infrared radiation is part of the electromagnetic spectrum that we cannot see with our eyes but we can feel as heat if the intensity is high enough. All objects emit some form of infrared radiation, and it's this radiation that a thermal camera captures to form an image.

2. Night Vision: Night vision devices (NVDs) primarily use two types of technology: image enhancement (or image intensification) and thermal imaging. Image enhancement works by collecting tiny amounts of light, including the lower portion of the infrared light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image.

In summary, both thermal imaging and night vision technologies use infrared waves, but they use them in different ways. Thermal imaging uses the infrared radiation emitted by objects, while night vision uses the infrared light reflected from objects along with the available light.