Wormholes are a hypothetical warped spacetime which are also permitted by the Einstein field equations of general relativity, although it would be impossible to travel through a wormhole unless it were what is known as a traversable wormhole. A proposed time-travel machine using a traversable wormhole would (hypothetically) work in the following way: One end of the wormhole is accelerated to some significant fraction of the speed of light, perhaps with some advanced propulsion system, and then brought back to the point of origin. Alternatively, another way is to take one entrance of the wormhole and move it to within the gravitational field of an object that has higher gravity than the other entrance, and then return it to a position near the other entrance. For both of these methods, time dilation causes the end of the wormhole that has been moved to have aged less than the stationary end, as seen by an external observer; however, time connects differently through the wormhole than outside it, so that synchronized clocks at either end of the wormhole will always remain synchronized as seen by an observer passing through the wormhole, no matter how the two ends move around. This means that an observer entering the accelerated end would exit the stationary end when the stationary end was the same age that the accelerated end had been at the moment before entry; for example, if prior to entering the wormhole the observer noted that a clock at the accelerated end read a date of 2007 while a clock at the stationary end read 2012, then the observer would exit the stationary end when its clock also read 2007, a trip backwards in time as seen by other observers outside. One significant limitation of such a time machine is that it is only possible to go as far back in time as the initial creation of the machine; in essence, it is more of a path through time than it is a device that itself moves through time, and it would not allow the technology itself to be moved backwards in time. This could provide an alternative explanation for Hawking's observation: a time machine will be built someday, but has not yet been built, so the tourists from the future cannot reach this far back in time...
...taken in the greenwich foot tunnel...
(greenwich yaya tüneli'nde çekildi.)
Critiques | Translate
krzychu30 (15512) 2014-02-23 9:07
extremly moody and inspiring composition!
The light as well as slightly tilted perspective and silhouettes of the persons make the shot special.
BennyV (16573) 2014-02-23 9:08
Great use of the angle to add an extra shot of drama to the scene. Also the cool monochrome does the job. Yet both elements only come to life through the two people in the middle, and the way they are placed.
Have a fine weekend.
HimalAnda (10665) 2014-02-23 12:07
Congratulations for this nice picture, with an excellent B&W treatment which gives a real atmosphere. I also like the way you composed this picture.
adidas5nb (5743) 2014-02-23 21:18
lovely artistic shot.great work here.love the angle of the shot and the candid frame.nicely done,creating a great mood.
- Copyright: korkut bostanci (bostankorkulugu) (42424)
- Genre: People
- Medium: Black & White
- Date Taken: 2013-12-07
- Categories: Daily Life, Transportation, Decisive Moment
- Camera: Canon EOS 650D, Canon EF-S18-55mm F3.5-5.6 II USM
- Exposure: f/3.5, 1/40 seconds
- More Photo Info: view
- Photo Version: Original Version
- Theme(s): wonders of the underworld [view contributor(s)]
- Date Submitted: 2014-02-23 8:56
- Favorites: 1 [view]