langey
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Registered: 7th Sep 03
Location: Wigan
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anyone know what it means? 
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Dan Lewis
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Registered: 31st Jan 05
Location: Leicestershire
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energy=mass (oversomething) sqaured
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langey
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Registered: 7th Sep 03
Location: Wigan
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energy = mass over speed of light squared
apparantly
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Rus
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Registered: 24th Jan 05
Location: SE London, Kent
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its a theroy of neutrons and protons. electrons shot in the two get stuck and cause a chain reaction. e.g. the atom bomb.
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Greg_M
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Registered: 2nd Sep 03
Location: Grantham, Lincolnshire
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its the theory of relativity, it theories' the passage of time and the passage of light
e= energy
m= mass
C= the speed of light
[Edited on 23-06-2005 by Greg_M]
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langey
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Location: Wigan
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i only made this post because it was on the tele just then, and i wondered wh else knew what it was.
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Skinz
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Registered: 15th May 03
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so e is the amount of energy you need to generate to move something of mass (m) fast enough to go back in time?
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Skinz
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Registered: 15th May 03
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or is it like, the mass times the speed of light squared equals the amount of energy you need to generate to move the mass fast enough to go back in time?
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richard_syko
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Registered: 17th Dec 03
Location: Newport, Wales
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Energy = Mass x Speed of light squared
Einstein's formula.
Basically shows mass and energy are interchangeble.
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richard_syko
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Location: Newport, Wales
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vibrio
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Registered: 28th Feb 01
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http://www.geocities.com/thesciencefiles/emc2/emc2.html
[Edited on 23-06-2005 by Ian]
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langey
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Location: Wigan
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ross  completly understood
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Skinz
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Registered: 15th May 03
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i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
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langey
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Registered: 7th Sep 03
Location: Wigan
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quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
thats just silly, no chance we'd ever be able to travel the speed of light.
and if we did, we'd not be able to see anything bacuse we'd have to wait for the light to catch up with us. 
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richard_syko
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Location: Newport, Wales
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quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
It is impossible though because you would have an infinitemass like Vibro!
[Edited on 23-06-2005 by richard_syko]
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Skinz
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Registered: 15th May 03
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quote:
Originally posted by langey
quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
thats just silly, no chance we'd ever be able to travel the speed of light.
and if we did, we'd not be able to see anything bacuse we'd have to wait for the light to catch up with us.
the world was flat in 220 BC
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richard_syko
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Registered: 17th Dec 03
Location: Newport, Wales
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quote:
Originally posted by Skinz
quote:
Originally posted by langey
quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
thats just silly, no chance we'd ever be able to travel the speed of light.
and if we did, we'd not be able to see anything bacuse we'd have to wait for the light to catch up with us.
the world was flat in 220 BC
Just won`t happen mate. Against the laws of physics. 
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Skinz
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Registered: 15th May 03
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Hers another puzzler to throw into the mix, if you were to dig straight down, and pretend you dont get burnt in the middle, what the hell would happen the other side? would you come out feet first? but thats impossible isnt it gravity wouldnt let you, the only thing i can think of is that youd end up floating in mid air at the centre of the earth
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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 which roughly equates to one of these: 
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richard_syko
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Location: Newport, Wales
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quote:
Originally posted by Skinz
Hers another puzzler to throw into the mix, if you were to dig straight down, and pretend you dont get burnt in the middle, what the hell would happen the other side? would you come out feet first? but thats impossible isnt it gravity wouldnt let you, the only thing i can think of is that youd end up floating in mid air at the centre of the earth
If there was air and not molten Iron, you are correct.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
It happens already when you look out into space, you're in fact seeing things as they were thousands or more years ago. It's one reason why searching for ET life through radio etc is flawed. If you look at it this way - if a race of beings was following the same evolutionary path as us, they would have to have originated a long time ago, in order to develop technology that we could pick up now with our current detectors. In other words, they'd have to be where we are now, but thousands of years ago, in order for the radio waves etc to reach our antennae.
So, we are in fact looking into the past just by gazing into space. Theory goes that if you could make a lens powerful enough, you could capture light from ages ago and therefore view the past. Trouble is making such a lens. 
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Russ
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Registered: 14th Mar 04
Location: Armchair
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quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
your confusing time with light.
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Rus
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Registered: 24th Jan 05
Location: SE London, Kent
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quote:
Originally posted by CorsAsh
quote:
Originally posted by Skinz
i sometimes think, what if we could travel faster than light, i mean if we could catch up with light that left the earth 2000 years ago, if we could focus on the light we would in affect be seeing the source of that light, be it a house or a city, 2000 years ago, and in effect be travelling back in time
It happens already when you look out into space, you're in fact seeing things as they were thousands or more years ago. It's one reason why searching for ET life through radio etc is flawed. If you look at it this way - if a race of beings was following the same evolutionary path as us, they would have to have originated a long time ago, in order to develop technology that we could pick up now with our current detectors. In other words, they'd have to be where we are now, but thousands of years ago, in order for the radio waves etc to reach our antennae.
So, we are in fact looking into the past just by gazing into space. Theory goes that if you could make a lens powerful enough, you could capture light from ages ago and therefore view the past. Trouble is making such a lens.
awesome read ash
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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I'm not as daft as Vibrio looks 
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Ian
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Registered: 28th Aug 99
Location: Liverpool
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The technology exists to make long lenses, they're just very expensive and difficult to make because of the very small manufacturing tolerances required.
The problem is that the image generated from such a lens would be so dark no current image sensor would be sensitive enough to amplify what little light came in without introducing masses of noise.
You also need to hold it fairly still of course.
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