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Chakras and a Balanced Brain
When does consciousness exist? Will the sentient robots being created with nanotechnology and the dumping of human memory such as was done to a computer chip by Stanford in 1999 have a soul of their own? I do not believe our soul is dumped in this...
Major landmarks on the moon
This article lists some of the more well-known and interesting
landmarks on the moon.
The moon is the second brightest object in our nighttime sky.
Our moon is also known as Luna and is our nearest neighbor. It
takes 27 and 1/3 days for the...
On Empathy - Part I
The Encyclopaedia Britannica (1999 edition) defines empathy as: "The ability to imagine oneself in anther's place and understand the other's feelings, desires, ideas, and actions. It is a term coined in the early 20th century, equivalent to the...
The Holy Grail of Science
Imagine playing football at the age of 239 with your grand-grand-grand children. Imagine donating blood at the age of 172. Imagine traveling into an inter-galactic spaceship to the andromeda galaxy. Imagine not getting common cold at all. And...
The Phenomenon of Russia
Translated from Russian. We shall be glad to receive your remarks on stylistics, grammar, and content issues. The Chinese proverb says: Before going somewhere, find out where you are. Having paraphrased on Russian, we shall receive: Before asking...
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Using a Night Vision Device
It's difficult to see in the dark. Unless there's some light
peeking in through the window or from under a door, our vision
is compromised. If we wait a little while, our night vision
kicks in, allowing us to see somewhat better. It's not enough
that we can read in the dark, but it should be enough to keep us
from stumbling into furniture or tripping over the carpet.
Sometimes though, our human night vision isn't enough and we
need a little help.
That's where technology kicks in. Thanks to science we can use
night vision to do all sorts of things. With the proper
equipment we can hunt, take pictures or even fight wars in the
dark. We can also perform surveillance and search and rescue
missions.
Here's how it works: Your night vision product will take
existing light and amplify it through an objective lens, which
then focuses on an image intensifier. A photocathode located
inside the intensifier converts the photon energy into
electrons. The electrons in turn strike a phosphor screen
creating a viewable image. In reality it looks like
you're
watching television on a green screen.
Atmospheric conditions can affect night vision. For instance, if
it's cloudy, foggy, or overcast, night vision can be
compromised. The clearer the night, the farther one will be able
to see with night vision technology. It should also be noted
that night vision shouldn't be magnified, as light is lost
during the magnification process making it more difficult to see.
Night vision devices include: - Cameras - Binoculars - Scopes
for firearms - Goggles
If you think that using a night vision device on a frequent
basis might be harmful, you couldn't be more wrong. Night vision
products are no more harmful than a television or movie screen.
It doesn't emit radiation or other harmful rays and there's no
reason for it to cause blindness.
About the author:
James Hunt has spent 15 years as a professional writer and
researcher covering stories that cover a whole spectrum of
interest. Read more at www.night-vision-cent
ral.info
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| Science/AAAS | Table of Contents: 1 December 2006; 314 (5804) |
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