thought provocation for the bored

[squeak9798 5,000+ posts]

light does have mass. very little, but it does. black hole's pull in light using gravity, which says that light does have mass.

Black holes (et al) affect light because space-time is warped.

E=mc^2

 

[squeak9798 5,000+ posts]

Energy/Light is mass.
That depends on which of two definitions of ’mass’ a particular physicist likes to use, and what type of light you’re talking about.

http://van.physics.uiuc.edu/qa/listing.php?id=2044

Copy-n-paste much?

 

[MmatsDude 10+ year member]

http://van.physics.uiuc.edu/qa/listing.php?id=2044
Copy-n-paste much?

i posted that link already on one of my posts.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[azimuth 5,000+ posts]

Black holes (et al) affect light because space-time is warped.
E=mc^2

vesc = (2GM/R)1/2

 

[squeak9798 5,000+ posts]

Actually scientist have broken the speed limit by reasearchers at the NEC R.I.P in NJ, they sended a pulse of light through a transparent chamber filled with cesium gas and pushed to travel at speeds of 3 times the normal speed of light. The light travels so fast that the main part of the light pulse exits the chamber even before it enters. Theoretically, this means that you could see a moment in time before it actually takes place, and i think this jeopardizes the theory of relativity wich rests on the idea that the speed of light is the universal limit to how fast anything can travel.

I seem to recall that experiment.....did Hawkin or Greene mention it in one of their books?

I don't recall it being used to jeopardize relativity though.

I'll have to ponder that one some more.

 

[azimuth 5,000+ posts]

and a black hole is a mass amount of gravity in a tiny space. the reason light gets pulled in, is because escape velocity is greater than the speed of light. just like earth has an escape velocity from it's gravity.

 

[Rashaddd 5,000+ posts]

Indeed. But if light has any mass at all. Can you condense that mass or increase the mass? If you can increase the mass wouldn't you be able to use that condensed light to push an object? Say that you have huge light bulbs and have them shine in a space where light has only a small exit? since light is always moving? I guess the only problem you would have is intense heat.

Its an interesting inquisition, but I find it hard to believe that they haven't thought of this already and thrown it out after experimenting (otherwise it would be a pretty important discovery)

I suspect the only thing that changes when you add multiple 'quantities' of light is heat and intensity (concentration), not velocity.

Also, you cannot condense light exactly...it doesn't interact with other light particles

 

[azimuth 5,000+ posts]

i don't think we'll hit close to the speed of light by forcing an object to that speed. maybe by manipulating the environment around the object.

 

[azimuth 5,000+ posts]

we need to create, and control, a schwarzchild radius.

 

[perfecxionX 10+ year member]

the singularity will make anything possible!

 

[azimuth 5,000+ posts]

the singularity will make anything possible!

a schwarzchild singularity

 

[squeak9798 5,000+ posts]

To reach the speed of light you must have infinite acceleration for a finite amount of time. Or finite acceleration for an infinite amount of time. I'm putting my vote on bending space-time for long distance traveling. Even if we could travel the speed of light, the closest star system is 4 light-years away. Others are millions of light-years. I hate being pessimistic but unless we can prove Einstein wrong, a space ship probably never will reach the speed of light.

I would agree.

 

[azimuth 5,000+ posts]

create a black hole, and use the schwarzchild radius, like a carrot on a stick in front of a donkey.

 

[MmatsDude 10+ year member]

I seem to recall that experiment.....did Hawkin or Greene mention it in one of their books?
I don't recall it being used to jeopardize relativity though.

I'll have to ponder that one some more.

Im still trying to find that article. Its some where. Sheeshh.//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Any good books you would recomend?

 

[squeak9798 5,000+ posts]

and a black hole is a mass amount of gravity in a tiny space. the reason light gets pulled in, is because escape velocity is greater than the speed of light. just like earth has an escape velocity from it's gravity.

The curvature of space-time is so extreme that light trying to escape simply gets bent back toward the singularity.