Does the night vision device still work in an absolutely dark environment?
There are two types of night vision devices. One is to convert the light signal into an electrical signal, and after strengthening, it is restored to a light signal, which is ineffective in absolute darkness. The second is to detect objects through the infrared rays emitted by the objects. As long as the objects are not at absolute zero, they will emit infrared rays, so they are effective in absolute darkness. (I haven't heard that there are things in real life that are absolute zero)
