The key involves
the relativistic effect of time, Krauss explains.
Not exact matches
4 And there is the
relativistic motion
of objects moving near the speed
of light (wavelength shifts red as its, let's say rate
of time, diminishes) and this is not dependent on direction as the Doppler
effect is.
We won't need to worry about near - light speed travel any
time soon, but Halimeh points out that GPS satellites already have to account for minute
relativistic effects, so it's possible that future applications
of transformation optics will have to pay attention to Einstein's theory.
But even at the speed and altitude
of jet aircraft, the
effects of relativistic time dilation are tiny — in the Hafele — Keating experiment the atomic clocks differed after their journeys by just tens to hundreds
of nanoseconds.
But the development
of optical clocks based on aluminum ions, which can keep
time to within one second in roughly 3.7 billion years, allows researchers to expose those diminutive
relativistic effects.
While at 146 minutes the film does feel longer than necessary (astrophysicist Neil deGrasse Tyson quipped
of the film's
relativistic effects, «Seventy - five minutes
of content
time - dilates into a 2.5 hour film.»)