light

Greetings I was told this today: When light approaches the coldest temperature, which is not zero degress but negative 273 degrees celsius or negative 459 degress fahrenheit (termed "absolute zero"), it ceases to move. Nothing can ever be colder than absolute zero since it is the point at...

High-Energy Laser Destroys Large-Caliber Rocket in History-Making Test More Air warfare is about to undergo another revolution like stealth warefare has already done. The advent of laser weaponary will make both aircraft, artillery, and missiles much easier to defeat at long ranges. I'll...

I was thinking about telescopes and cameras the other day (I own at least two of each) and I got thinking about how much light pollution we have. I've only been able to really pick out the Milky Way on a few occasions, and only once was it exceptionally clear. Then I got to thinking... could...

Heh, I'd always suspected that people who get up at 4 am to deliver newspapers are interlopers from another planet. :D :D :D :D :D

Take a look around you. Rather, take a look around your awareness. What do you see? - You see light in various shades of colour. It's a bleedin light show! Now, we all know that colours are subjective. I.e., they do not exist objectively, in any external universe. The universe doesn't know what...

I got this in a email so dont anyone get mad at me but it is so funny you got to see it How many Christians does it take to change a light bulb? Charismatic : Only 1 Hands are already in the air. Pentecostal : 10 One to change the bulb, and nine to pray against the spirit of...

My father and I have been having a little argument, and while this is certainly not the cutting edge scientific stuff frequently discussed on here I'd like the opinion of someone perhaps better informed than myself. We just bought a new light fixture for the kitchen, it can hold 5 bulbs. If...

These folks were featured in our local paper. And our local editor got mad at me when I said he could dumb down our community faster in a day than our education system ever could!;) www.lightyearsahead.net

http://www.theage.com.au/articles/2004/01/07/1073268070642.html Just an anecdote to demonstrate that you don't need a gun to get criminals to stop a crime, often you just need to let them know they are being observed and will be caught by the police because they have been identified. I am sure...

I know that the Andromada galaxy is 26 million light years away from here, but if that's so, and that galaxy is moving because of it's gravitational attraction towards us shouldn't it have already reached us in the past or am I confused becuase light travels faster then gravity. Brian Greene...

De_Bunk's thread reminded me of something I could never figure out. How do console "Light Guns" (A la the old "Duck Hunt" game, for instance) work? Does anyone know? How does it know where you are aiming? I can see how the gun can feed back to the console, obviously, but how does it position...

First of all, I am not a scientist or mathematician. I need help understanding a slightly abstract and bizarre concept. I am under the impression that current scientific thought on light suggests that it is both particles and wave. If this is correct, I need help understanding the wave part...

I am a complete novice when it comes to any kind of topic relating to Physical Science- however, recently I came across an idea I couldn't seem to fully grasp. Perhaps some people on this message board can help me out. I have often heard the statement "black holes are so powerful, in fact...

Check out "Newshounds".

A quick reference shows the speed of light (through a vacuum) is 299 792 458 meters per second. Why cant it go faster? I've read a few articles on scientists breaking the speed of light barrier, did they really do it? I've heard that approaching the speed of light causes time to slow and...

LENs = Light Emitting Nanotubes IBM's nanotubes yield smallest solid-state emitter Anyone else envisioning nano-bots carring around nano-flashlights? you mathematical types might find this concept interesting..

This may have been discussed before but it recently came up in another forum I read. At the link listed is what someone has said is the evidence for the type of therapy they plan to use on their horse. I don't recall the horse's problem. Something with its back, I think...

say the sun popped out of existence. we wouldnt know for around 7 minutes because of it's distance and how long the sun's light takes to reach us. ok, simple enough. but if the sun popped out of existence would it's gravity exerted on us (and every other object in our solar system) cease...

This is really a fluff topic. It arose from reading some short stories around the subjects of lightspeed travel and a couple books on the subject by physicists. Now, I'm an armchair physicist at best with merely an undergrad minor in the subject, so bare with me, and please correct me on...