Answer
Most visioning systems, the unaided eye, regular cameras, and even night vision googles all rely on there being a source of light shining on whatever you wish to see, and some of that light bouncing off the object, and back into your eye.
The systems usually referred to as Night vision are usually based on light amplification, and doesn't work in absolute darkness. Even the best ones needs a tiny bit of light to work with.
(Passive) infra red works in a completely different way. All things that are warmer than absolute zero radiates some thermal energy - heat radiation, in the area of wavelengths called infrared. If you have a device sensitive enough to these wavelengths, you can then see your surroundings by the radiation from the temperature differences between different objects.
(Passive) IR does work in total darkness, as long as there are enough temperature differences in the scene. You could bring it down into a deep cellar, or a cave, and you'd still see something.
As a separate sub-set there are Active IR systems as well. These work pretty much like regular visioning systems, only with the illuminator and the viewer shifted out of the range of the unaided Eye.
Answer
infrared rays lie in that part of light spectrum that is invisible to human eye, however some highly sensitive light sensors detect infrared rays, so these rays are used in night vision cameras and binoculars. these rays are focussed at some object that has to be viewed. the infrared sensors detect the reflected rays from that object and this is how we can see in the dark using these rays.
Answer
because it enables you to see warm objects, so if, for example, somebody was lost on a hill, in the dark, you would just have to scan for a hot human shaped blob, instead of using torchlight
Well, night vision goggles are used by people under cover. Pretty much people that work for the government. LIke, the CIA and the FBI probably use night vision so they don't have to use flashlights when on a mission. Obviously because flashlights could blow their cover.
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Transferable technology is technology that can be applied to multiple situations. An example of this is the zipper, although it's not really thought of as technology. Zippers are found on coats, jeans, duffel bags, you name it. Other examples are springs, lasers, and infrared. Any technology, whether it be simple or complex, that can be used for various tasks is transferable technology. Hope this answers your question! ;-)
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FIber Technology is used in many things: i.e. Telecom Technology Internet Technology Communication technology
All different types of technology are used in different projects depending on what those projects are for. Some projects use information technology, industrial technology, computer technology, or all three.
Infra-red waves are used in night vision apparatus.
REMOTES used to control Televisions & Night Vision Camerasmake use of INFRARED light waves.
It is used in medical healing. It is used in night vision apparatus.
It is used in medical healing. It is used in night vision apparatus.
No, night vision is the ability to see in low light condition and infrared vision is the capability of biological or artificial systems to detect infrared radiation. The terms thermal vision and thermal imaging, are also commonly used in this context since infrared emissions from a body are directly related to their temperature: hotter objects emit more energy in the infrared spectrum than colder ones.
A night vision monocular is typically used for enhancing visibility and observing objects or activities in low-light or dark environments, providing clearer vision and the ability to see in the dark with the assistance of infrared technology.
Night vision optics are pervasive all over the world. The infrared glasses are available in stores all over the nation.
tv remoteShopping check outSeeing in the dark cameras
infrared
Infrared light is used for many industrial and scientific applications. It is also used in many medical and consumer device, light night vision devices.
infrared
Communications Remote control (TVs etc) Night vision goggles