Simply by intensifying the available light - from stars, ambient light, etc.
Because humans have poor night vision.
Yukon night vision devices are, as the name suggests, used for seeing at night. They are also useful for seeing in the daytime if adapted with pinhole lenses, or in any low-light environment.
Yes it is, it is used in security lights, burglar alarms and night vision devices
infrared
Infrared waves are used in technological devices like night vision goggles and heat-seeking missiles. These devices detect and interpret the thermal radiation emitted by objects to create images or track targets based on their heat signatures.
Some affordable night vision options on the market include digital night vision scopes, monoculars, and goggles. These devices typically range in price from 100 to 500 and can be found from various brands such as Sightmark, Firefield, and Bushnell.
Night sights, such as night vision goggles, typically use the infrared band of the electromagnetic spectrum. Infrared light is emitted by warm objects and can be detected by night vision devices to create nighttime images.
infrared
Night Vision DevicesThe original night-vision unit (Generation 0) was created by the U.S. Army for use in W.W. II and the Korean war. Generation 3 devices are currently used by the military. (One of the pioneers in this technology was William Spicer) The first night vision devices were introduced by the German army as early as 1939. The first devices were being developed by AEG starting in 1935.The Main inventor of the night vision Devices is Mitchell Andrew Forbes
Night Owl Optics offers night vision devices such as Binoculars and Monoculars. You can learn more about Night Owl Optics online at the Night Owl Optics website.
Infrared waves are used in night vision apparatus to capture images in low light or no light situations. These waves are not visible to the human eye but can be detected and translated into visible images through special technology in night vision devices.
You can purchase digital night vision goggles in hunting stores and sometimes in gun shops. If all else fails you can shop online for them, Amazon and eBay should be your first start.