Home | Community | Message Board


This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Kraken Kratom Shop: Red Vein Kratom

Jump to first unread post Pages: 1
InvisibletrendalM
J♠
Male User Gallery


Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada Flag
Lasers in the radio part of the spectrum...
    #8165614 - 03/19/08 07:35 AM (16 years, 2 months ago)

Do they exist?


--------------------
Once, men turned their thinking over to machines in the hope that this would set them free.
But that only permitted other men with machines to enslave them.

Extras: Filter Print Post Top
OfflineSeussA
Error: divide byzero


Folding@home Statistics
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 3 months, 8 days
Re: Lasers in the radio part of the spectrum... [Re: trendal]
    #8165641 - 03/19/08 08:03 AM (16 years, 2 months ago)

Masers exist... (Microwave range)


--------------------
Just another spore in the wind.

Extras: Filter Print Post Top
InvisibletrendalM
J♠
Male User Gallery


Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada Flag
Re: Lasers in the radio part of the spectrum... [Re: Seuss]
    #8165647 - 03/19/08 08:09 AM (16 years, 2 months ago)

Yeah...but that's not far enough :smirk:


--------------------
Once, men turned their thinking over to machines in the hope that this would set them free.
But that only permitted other men with machines to enslave them.

Extras: Filter Print Post Top
InvisibleAsante
Omnicyclion prophet
Male User Gallery

Registered: 02/06/02
Posts: 87,645
Re: Lasers in the radio part of the spectrum... [Re: trendal]
    #8168581 - 03/19/08 07:06 PM (16 years, 2 months ago)

Do you want to send radio signals to alien worlds?


--------------------
Omnicyclion.org
higher knowledge starts here

Extras: Filter Print Post Top
InvisibletrendalM
J♠
Male User Gallery


Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada Flag
Re: Lasers in the radio part of the spectrum... [Re: Asante]
    #8171203 - 03/20/08 10:33 AM (16 years, 2 months ago)

No, I'm more interested in terrestrial applications :wink:


--------------------
Once, men turned their thinking over to machines in the hope that this would set them free.
But that only permitted other men with machines to enslave them.

Extras: Filter Print Post Top
InvisibleAsante
Omnicyclion prophet
Male User Gallery

Registered: 02/06/02
Posts: 87,645
Re: Lasers in the radio part of the spectrum... [Re: trendal]
    #8174299 - 03/20/08 11:28 PM (16 years, 2 months ago)

Non-scatter data transmission?


--------------------
Omnicyclion.org
higher knowledge starts here

Extras: Filter Print Post Top
Offlinestefan
work in progress


Registered: 04/11/01
Posts: 8,932
Loc: The Netherlands
Last seen: 17 days, 19 hours
Re: Lasers in the radio part of the spectrum... [Re: trendal]
    #8175264 - 03/21/08 09:45 AM (16 years, 2 months ago)

you would have to aim it VERY carefully to a reciever:smirk:

Extras: Filter Print Post Top
Invisiblekoppie
astral projectile
Male

Registered: 07/23/04
Posts: 2,653
Loc: cloud hidden
Re: Lasers in the radio part of the spectrum... [Re: trendal]
    #8182686 - 03/23/08 07:41 AM (16 years, 1 month ago)

I believe what you are referring to is a radio transmitter.

A laser or maser traditionally is an amplifying medium placed in a resonant cavity. Feedback from the cavity (a pair of mirrors in the case of a laser or a tuned waveguide in the case of a maser) turns the amplifier into an oscillator.

In a radio transmitter the amplifying medium is either a transistor or a vacuum tube and the feedback is provided by a tuned coil/capacitor or a Quartz crystal.

High power transmitters usually have amplifying stages following the oscillator. This scheme is mirrored in the design of high powered lasers (as used in fusion research) where one traditional laser is followed by several stages of laser medium without mirrors, which amplify the beam from the first laser.

If you want a low divergence beam you need to make it a couple of thousand wavelengths wide to compensate for diffraction. In the case of a laser this means a diameter of a few mm, in the case of radio waves you need something akin to the Arecibo dish to get a nice parallel beam of about a mile across. Not very practical on earth.

Extras: Filter Print Post Top
Jump to top Pages: 1

Kraken Kratom Shop: Red Vein Kratom


Similar ThreadsPosterViewsRepliesLast post
* Shortwave Radio Question MercuryDrinker 452 2 02/17/09 11:21 PM
by Alan Rockefeller
* Shortwave radio enthusiasts? Blastrid 1,238 6 05/06/06 06:47 PM
by vermonster
* Help me understand radio technology please... Enthrall 543 3 03/24/09 03:57 PM
by HighTek
* University of Michigan creates most intense laser automanM 1,023 5 02/20/08 05:21 AM
by Asante
* Bouncing Radio Waves Off The Moon! DiploidM 1,128 5 02/02/06 09:21 PM
by Diploid
* Sick of MP3 player FM transmitters RandalFlagg 669 2 01/16/06 10:06 PM
by Vvellum
* NASA research team successfully flies first laser-powered ai wingnutx 1,702 6 10/11/03 03:28 AM
by Le_Canard
* Long range transmitter for r/c vehicle? Ego Death 615 2 05/14/05 02:18 PM
by Ego Death

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: trendal, automan, Northerner
1,044 topic views. 0 members, 0 guests and 2 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2024 Mind Media. Some rights reserved.

Generated in 0.021 seconds spending 0.007 seconds on 14 queries.