Slashdot Mirror
Send Morse Code Over Stockholm By Laser
bigmac writes "KTH, Royal Institute of technology is celebrating 175 year anniv by making a very spectacular laser show. A green laser sent from the bottom of an old reactor building 30 meters below ground. The beam is then reflected over the city from the schools clock tower.
And yes, you can send your own laser-morse messages through their homepage!" Here's an image to chew on.
'All your base are belong to us.'
Click on "Ljus Telegraph" to send your own message. Ditt meddelande = Your message. Avsändare = Message sender. That's it. Quite simple.
You can get an English translation here. Sorry, Babelfish doesn't have Swedish yet ;)
Please notice however, that Richard M. Stallman was given an honorary doctorate at KTH already in 1996!
Reality or nothing.
during my daily surf, two month ago, i found this to make my own morse code. have fun! =)
irma trattino
eat.me at http://irmetta.free.fr
There's nothing to convince me that the picture's a fake.
I've seen green laser that were intense enough to been seen by the naked eye.. If you look at it from the correct angle with respect to the polarization, of course
"I don't know that Atheists should be considered as citizens, nor should they be considered patriots." -George H.W. Bush
"Stockholm by night"
In a symbolic meeting between academia and the rest of the world, Stockholm's night sky will be adorned by a beam of light. A beam that has its origins in history, is part of our time and endeavours towards the future. A beam reflecting the advancements of technology and enterprise. A curious beam.
From a point 30 meters below the face of the earth, where once Sweden's first nuclear reactor was, a laser beam is produces and is reflected by the tower where pioneers once sent the first TV signals across Sweden. From here, the light is further projected over the city before reaching its goal: the City Hall.
I stand corrected, that was a knee jerk reaction. I was raised on "nah you stewpid kid, them lazeers you see on Starr Wars ain't real, you cant see lazeers you idjet". A quick google confirms your hubris. Heh.
Actually it doesn't have to have sufficient power to ionize the surrounding air. Lasers are (if they're powerful enough) able to cause dipole radiation, without ionizing any molecules.
the dipole oscillations are oriented with respect to the polarization of the light, so this light is most intense if you see it from an angle perpendicular to the polarization.
It's true that weak lasers has to reflect of particles, but I'm sure that this laser is powerful enough to cause dipole radiation... (maybe the reason why the didn't just move the laser from the basement it's placed in)
"I don't know that Atheists should be considered as citizens, nor should they be considered patriots." -George H.W. Bush
Check out all the other photos from the event here.
The distance from source to target is around three miles, give or take. The beam is horizontal, some 50+ meters above ground.
It does look real. A green laser (Argon or DPSS) is 3-4 times more visible to the human eye than a red laser(which is the color most people think of when the word laser comes up). Since it's a direct beam and not being scanned to make pictures or effects, it looks even brighter. On a hazy night, a laser with a few watts (30-40) of power could be seen for miles.
D
The first, last, and only tech news site on the net
... by the same group who did the show in the article
I don't understand Knåkkebrøtish, but it looks kuhl.
Check here
Privacy is terrorism.