Old 11-14-2010, 10:38 PM #1
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
BlueToast BlueToast is offline
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
Question Lasers in space

Yeah, I know none of you can provide pictures of this.. but...

what would it be like to turn on a laser in space? How would the laser work? Or like.. would it go a farther distance? How would the photons behave differently (if at all)? :?

Also, I have another question: in comparison to the speed of light, how fast do laser photons travel? Same speed?

Would be friggin cool to experiment with lasers in space.


BlueToast is offline   Reply With Quote


















Old 11-14-2010, 10:45 PM #2
IsaacT's Avatar
Class 4 Laser
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
IsaacT IsaacT is offline
Class 4 Laser
IsaacT's Avatar
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
Default Re: Lasers in space

Lasers are light so they will travel at the speed of light
__________________
ALL MY BUILDS/REVIEWS HERE *CLICK!*
MY BEST BUILDS: Adegan Relic | Aquarius | Frost | Ivy

Been bitten by the shutterbug hard.

IsaacT is offline   Reply With Quote
Old 11-14-2010, 10:57 PM #3
laser_freak's Avatar
Class 2M Laser
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
laser_freak laser_freak is offline
Class 2M Laser
laser_freak's Avatar
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
Default Re: Lasers in space

Quote:
Originally Posted by BlueToast View Post
Yeah, I know none of you can provide pictures of this.. but...

what would it be like to turn on a laser in space? How would the laser work? Or like.. would it go a farther distance? How would the photons behave differently (if at all)? :?

Also, I have another question: in comparison to the speed of light, how fast do laser photons travel? Same speed?

Would be friggin cool to experiment with lasers in space.
I always facepalm when someone asks this. Lasers don't "go" a certain distance. It's understandable why someone might ask the question, but you should understand that the light will travel forever until it is blocked by an object.
laser_freak is offline   Reply With Quote
Old 11-14-2010, 10:59 PM #4
Meatball's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 120728
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Meatball Meatball is offline
Class 3B Laser
Meatball's Avatar
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 120728
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Default Re: Lasers in space

Well you wouldn't see a beam, but light can actually propagate better in a vaccum where there is no medium.

And you can always count on those longer wavelengths of light to travel just a little bit faster than your blues and violets.
__________________
FIAT LUX

(\__/)
(='.'=)
(")_(")
Meatball is offline   Reply With Quote
Old 11-14-2010, 11:04 PM #5
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
BlueToast BlueToast is offline
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
Default Re: Lasers in space

Quote:
Originally Posted by laser_freak View Post
I always facepalm when someone asks this. Lasers don't "go" a certain distance. It's understandable why someone might ask the question, but you should understand that the light will travel forever until it is blocked by an object.
If that is the case, then they could use lasers as a form of long-distance communication ... or at least one way of doing it.

Kind of like fiber and infrared connections. They could stream HD videos of Mars like this.
BlueToast is offline   Reply With Quote
Old 11-14-2010, 11:18 PM #6
IsaacT's Avatar
Class 4 Laser
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
IsaacT IsaacT is offline
Class 4 Laser
IsaacT's Avatar
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
Default Re: Lasers in space

I know it isn't long distance, but you can transmit your voice via laser to a speaker a ways away very easily and fairly cheaply.
__________________
ALL MY BUILDS/REVIEWS HERE *CLICK!*
MY BEST BUILDS: Adegan Relic | Aquarius | Frost | Ivy

Been bitten by the shutterbug hard.

IsaacT is offline   Reply With Quote
Old 11-14-2010, 11:20 PM #7
laser_freak's Avatar
Class 2M Laser
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
laser_freak laser_freak is offline
Class 2M Laser
laser_freak's Avatar
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
Default Re: Lasers in space

Quote:
Originally Posted by BlueToast View Post
If that is the case, then they could use lasers as a form of long-distance communication ... or at least one way of doing it.

Kind of like fiber and infrared connections. They could stream HD videos of Mars like this.
Well, sort of. Scientists often bounce lasers off the moon and record the time it takes for the photons to travel back. However, only a very, very few number of photon actually make it back to the scientists on Earth. Even then it's hard to distinguish them from other photons that didn't come from the laser.
laser_freak is offline   Reply With Quote
Old 11-14-2010, 11:23 PM #8
Petacat's Avatar
Class 1M Laser
 
Join Date: Oct 2010
Location: After retiring, I have moved around alot.
Posts: 165
Rep Power: 15
Petacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to behold
Petacat Petacat is offline
Class 1M Laser
Petacat's Avatar
 
Join Date: Oct 2010
Location: After retiring, I have moved around alot.
Posts: 165
Rep Power: 15
Petacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to beholdPetacat is a splendid one to behold
Default Re: Lasers in space

lay of the getting toasted, and wake up in your basic science classes.
Petacat is offline   Reply With Quote
Old 11-14-2010, 11:47 PM #9
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
BlueToast BlueToast is offline
Member
 
Join Date: Oct 2010
Posts: 31
Rep Power: 0
BlueToast is on a distinguished road
Default Re: Lasers in space

Quote:
Originally Posted by laser_freak View Post
Well, sort of. Scientists often bounce lasers off the moon and record the time it takes for the photons to travel back. However, only a very, very few number of photon actually make it back to the scientists on Earth. Even then it's hard to distinguish them from other photons that didn't come from the laser.
But what if you had a satellite that would transmit/receive data between the space craft, and then the right technology for back-to-ground-on-Earth transmission.

Space craft would only have to be able to see the satellite from Mars, and as long as the lasers on both can be seen by each other (satellite <-> spacecraft), it should make a somewhat alright connection (except for when debris floats through or other planets/moons are in the way).
BlueToast is offline   Reply With Quote
Old 11-15-2010, 12:06 AM #10
laser_freak's Avatar
Class 2M Laser
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
laser_freak laser_freak is offline
Class 2M Laser
laser_freak's Avatar
 
Join Date: Jan 2008
Location: Maine, US
Posts: 673
Rep Power: 102547
laser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond reputelaser_freak has a reputation beyond repute
Default Re: Lasers in space

Quote:
Originally Posted by BlueToast View Post
But what if you had a satellite that would transmit/receive data between the space craft, and then the right technology for back-to-ground-on-Earth transmission.

Space craft would only have to be able to see the satellite from Mars, and as long as the lasers on both can be seen by each other (satellite <-> spacecraft), it should make a somewhat alright connection (except for when debris floats through or other planets/moons are in the way).
But why use a laser when there are other, better forms of electromagnetic communication?
laser_freak is offline   Reply With Quote
Old 11-15-2010, 12:50 AM #11
qumefox's Avatar
Class 3B Laser
 
Join Date: Mar 2010
Location: Jackson, TN
Posts: 3,234
Rep Power: 54792
qumefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond repute
qumefox qumefox is offline
Class 3B Laser
qumefox's Avatar
 
Join Date: Mar 2010
Location: Jackson, TN
Posts: 3,234
Rep Power: 54792
qumefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond repute
Default Re: Lasers in space

Radio waves travel at the speed of light, just like.. well.. light does. There is no speed improvement.. at least due to the medium that's carrying the information, of lasers over RF. The only benefit lasers would have in communication, would be the ability to send information to specific areas, and not just the 'general direction' of the receiver.. Though even this is really only practical over relatively short distances, considering it's not possible to achieve a perfectly nondivergent beam.

The only true advantage lasers would have over longer wavelengths is that the smaller the wavelength, the faster it can be modulated, which means the more data that can be transferred.
__________________
Wavelengths in 'The Collection'
685nm, 655nm, 635nm, 589nm, 532nm, 473nm, 445nm, 405nm

Last edited by qumefox; 11-15-2010 at 05:34 AM.
qumefox is offline   Reply With Quote
Old 11-15-2010, 02:40 AM #12
Junior Member
 
Join Date: Nov 2010
Posts: 14
Rep Power: 0
HotUSA is an unknown quantity at this point
HotUSA HotUSA is offline
Junior Member
 
Join Date: Nov 2010
Posts: 14
Rep Power: 0
HotUSA is an unknown quantity at this point
Default Re: Lasers in space

If you pointed your simple torch to the sky. the light will travel forever. . . .
until it hits something out there.
HotUSA is offline   Reply With Quote
Old 11-15-2010, 03:37 AM #13
IsaacT's Avatar
Class 4 Laser
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
IsaacT IsaacT is offline
Class 4 Laser
IsaacT's Avatar
 
Join Date: Aug 2010
Location: Tucson, AZ
Posts: 5,908
Rep Power: 16066
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
Default Re: Lasers in space

remember that there are molecules in the air. If the atmosphere was a vacuum with no molecules then tht is one thing. But with all of the particles floating around, light gets filtered out by a certain point. Thats why it won't just "go on forever".
__________________
ALL MY BUILDS/REVIEWS HERE *CLICK!*
MY BEST BUILDS: Adegan Relic | Aquarius | Frost | Ivy

Been bitten by the shutterbug hard.

IsaacT is offline   Reply With Quote
Old 11-15-2010, 04:10 AM #14
Junior Member
 
Join Date: Nov 2010
Posts: 14
Rep Power: 0
HotUSA is an unknown quantity at this point
HotUSA HotUSA is offline
Junior Member
 
Join Date: Nov 2010
Posts: 14
Rep Power: 0
HotUSA is an unknown quantity at this point
Default Re: Lasers in space

good point
HotUSA is offline   Reply With Quote
Old 11-15-2010, 05:32 AM #15
chipdouglas's Avatar
Class 3B Laser
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 139980
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
chipdouglas chipdouglas is online now
Class 3B Laser
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 139980
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default Re: Lasers in space

also the speed of light is faster in space than it is here on earth.


michael
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is online now   Reply With Quote
Old 11-15-2010, 06:11 AM #16
Meatball's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 120728
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Meatball Meatball is offline
Class 3B Laser
Meatball's Avatar
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 120728
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Default Re: Lasers in space

I believe that TV transmission satellites use wavelength on the order of a dozen centimeters of so, which qualify as microwaves. Radio waves are a little too un-directional sometimes. But that again depends of the wavelength. AM broadcast towers can be made very directional- you can pretty much aim them to anywhere in the world.

So as far as communication goes, I think microwaves are best as they don't need a perfect line of sight connection, and they don't get stretched out too much when they pass through dense gases... such as water vapor.
__________________
FIAT LUX

(\__/)
(='.'=)
(")_(")
Meatball is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 06:34 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC