| "body"> | | | | reality it looks like you're watching television on a green |
| It's difficult to see in the dark. Unless there's some light | | | | screen. |
| peeking in through the window or from under a door, | | | | Atmospheric conditions can affect night vision. For |
| our vision is compromised. If we wait a little while, our | | | | instance, if it's cloudy, foggy, or overcast, night vision |
| night vision kicks in, allowing us to see somewhat | | | | can be compromised. The clearer the night, the farther |
| better. It's not enough that we can read in the dark, but | | | | one will be able to see with night vision technology. It |
| it should be enough to keep us from stumbling into | | | | should also be noted that night vision shouldn't be |
| furniture or tripping over the carpet. Sometimes though, | | | | magnified, as light is lost during the magnification |
| our human night vision isn't enough and we need a little | | | | process making it more difficult to see. |
| help. | | | | Night vision devices include: |
| That's where technology kicks in. Thanks to science | | | | - Cameras |
| we can use night vision to do all sorts of things. With | | | | - Binoculars |
| the proper equipment we can hunt, take pictures or | | | | - Scopes for firearms |
| even fight wars in the dark. We can also perform | | | | - Goggles |
| surveillance and search and rescue missions. | | | | If you think that using a night vision device on a |
| Here's how it works: Your night vision product will take | | | | frequent basis might be harmful, you couldn't be more |
| existing light and amplify it through an objective lens, | | | | wrong. Night vision products are no more harmful than |
| which then focuses on an image intensifier. A | | | | a television or movie screen. It doesn't emit radiation or |
| photocathode located inside the intensifier converts the | | | | other harmful rays and there's no reason for it to |
| photon energy into electrons. The electrons in turn | | | | cause blindness. |
| strike a phosphor screen creating a viewable image. In | | | | |