Question

Why can you see a human being or animal with a light a night Vision device even in total darkness?

A.the device can make living beings illuminate

B.a program in the device detects moving beings and object and visually highlights them

C.the body heat gives rise to thermal radiation in the infrared which is picked up by the device.

D.the device actually translates sound waves from an organism into visual information

R.none of the above

Answer 1

the correct option is c