|Could you please tell me if is it possible to
replace telephone lines by electromagnetic waves
such as tv broadcasts, so that one would access
the internet anywhere simply by the help of an
antenna like he does the same while he wishes to
watch TV? Without any cables I hope you can get
my question. And thanks in advance for your
|Question Date: 2004-05-05|
In order to communicate (and surfing the web is
just that) without using a cable, you need both a
transmitter and a receiver.
possible. A television, however, is only a
receiver, so you would need a transmitter as well.
Communication via light might also be slower,
since it would have to reflect light off of
satellites. In short, there are several technical
difficulties. However, I would wager a guess that
the internet of the future will be very much like
that, though I would not care to guess when.
This is already starting to happen - I am using
I have a telescope at the White Mountain
Research Station (http://www.wmrs.edu) in the
Inyo-White Mountains in eastern California.I am
able to control my telescope from Santa Barbara
using the internet even though there are no phone
lines or cables going up to the station,which is
at about 12500 ft. elevation.
We have two
methods of wireless internet. The first one is by
using a dish to send signals to (and receive
signals from) a satellite which communicates with
some base station somewhere that is connected to
the wired internet. The other method uses radios
that send signals from a station in Bishop, CA to
an antenna on the peak of White Mountain (elev.
14246 ft.) which then transmits to another antenna
where my telescope is. The radio method is much
faster than the satellite method but we are still
working out reliability issues so it is nice to
have both in case one goes down for some
In addition, there are ways of setting
up local wireless networks in small areas - like
inside buildings. Also, I believe some cells
phones have the equivalent of wireless internet
access. I think there are probably a lot of
issues to be worked out before we get to the point
where you could have some sort of antenna on your
PC that would allow you to hook up to the internet
wirelessly no matter where you are but it is possible.
Yes, that is indeed possible. In fact, current
cell phones use electromagnetic waves to allow
people to talk and access the internet in much the
same way you are imagining. The only problem is
cell phones don't have very fast connections right
now. The current speed is around 10 Kbps (Kilobits
per second)which is slower than the speeds people
can obtain from regular modems which goat about56
Kbps and considerably slower than cable modems and
DSL. However,there are new wireless technologies
such as 4G which are being developed and will
allow for speeds of up to 10 Mbps (Megabits per
second)! Thanks for your question!
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