The clock moves along the positive xaxis with speed v a stationary observer records the time the light pulse starts and a second stationary observer, farther to the right along the xaxis, records the time when the light. 13suppose you see a spaceship with a clock on it hurtling past you at 80% of the speed of light as it goes by, the second hand on the ship's clock ticks off five seconds. The speed of electric transmission (about the same as the speed of light) is the absolute physical limit, since no data can be transmitted faster than it's medium at the same time this limit is very high, so it is not usually a limiting factor. So a light clock at the speed of light would just be three photons in succession, essentially (the other two serving as useless mirrors) this simply travels as a unit, the photon in the middle does not bounce against the others but keeps a constant distance to them as seen to the outside observer. If the frequency of blinks for a light source appears to double as the light source approaches you, the frequency of blinks as it moves away from you at the same speed is halved suppose you and your sister travel at different speeds in space and you note a slowing of her clock.
The two-way speed of light is the average speed of light from one point, such as a source, to a mirror and back again because the light starts and finishes in the same place only one clock is needed to measure the total time, thus this speed can be experimentally determined independently of any clock synchronization scheme. [physics faq] - updated 2014 by don koks original by steve carlip (1997) and philip gibbs 1996 is the speed of light everywhere the same the short answer is that it depends on who is doing the measuring: the speed of light is only guaranteed to have a value of 299,792,458 m/s in a vacuum when measured by someone situated right next to it. So, if we were able to accelerate a clock to nearly the speed of light, that clock would tick very slowly if we could somehow reach the speed of light, the clock would stop completely this isn’t a problem with the clock the effect would happen regardless of the clock’s particular construction because it is time itself that is slowed.
Light having a finite speed was a violation of aristotelian mechanics (later replaced by newtonian mechanics) -there were however some notable dissenters aristotle condemned the ideas of empedocles of acragas who spoke of light as traveling, but the movement being unobservable to humans. 1) the mass of an atom does not change when it emits light 2) a static body has energy but no kinetic energy 3) relativistic effects are especially important when speeds are close to the speed of light 4) a moving clock runs quickly 5) the lengths along the direction of motion of moving objects are shorter than when they are at rest. On the constancy of light speed by abdul rouf national institute of technology, srinagar, kashmir of physics ﬁnd the constancy of light speed counterintuitive and logically inconsistent the main reason is that, in introductory courses to special rel- rest photon clock in other words, speed of light remains constant. The possibility of truly synchronising clocks exists because the speed of light is constant and this constant velocity can be used in the synchronisation process (the use of the predictable delays when light is used for synchronising clocks is known as einstein synchronisation. If you could travel away from the clock as the speed of light and view it with a telescope, it would be frozen at 12 noon a spaceship that is traveling very fast with respect to your frame of reference, fires a photon beam the travels at speed c with respect to the spaceship.
The tricky part here is, as you leave the speed of light where time is frozen, when you start to slow down, time begins to move forward again and the slower you get from the speed of light, the more time itself begins to move faster. Time dilation can be inferred from the observed constancy of the speed of light in all reference frames dictated by the second postulate of special relativity this constancy of the speed of light means that, counter to intuition, speeds of material objects and light are not additive. Albert einstein's theory of relativity (chapter 3): space-time and the speed of light moving clocks are measured to tick more slowly than an observer's stationary clock. When you are traveling faster than the speed of light, the clock is slowing down is because you are moving faster than light and you are time traveling so for my opinion, time travel is real reply. An observer moving very close to the speed of light will experience less time passing than an observer standing still it's not that the moving observer's biological clock slows down it's that everything slows down.
Even at the low speed of 10% of the speed of light (300,000 km per second, or 186,300 miles per second) our clocks would slow down by only around 1%, but if we travel at 95% of the speed of light time will slow down to about one-third of that measured by a stationary observer. The clock that changed the meaning of time what, he wondered, would happen if a streetcar raced away from the tower at the speed of light if he was sitting in the streetcar, he realised, his. If i am starring at a clock which has one minute to 12 and i am travelling away from the clock at the speed of light, meaning that the image of the clock ticking one minute to 12 is moving towards my eyes the same speed as i am travelling, therefore it will allways be one to 12 for me but for other people who are standing by the clock,time will. The speed of light in empty space is a universal physical constant this means it is the same everywhere in empty space and does not change with time physicists often use the letter c to denote the speed of light in empty space (vacuum) it has the value 299,792,458 meters per second (or about 186,282397 miles per second) a photon (particle of light) travels at this speed in a vacuum.
A light clock oriented perpendicular to the direction of its motion slows by a factor of 10 when it moves at 995% the speed of light a light clock oriented parallel to the direction of its motion must slow by the same amount when it moves at 995% the speed of light. For example, if the speed of light were to speed up slightly, would that somehow is the accuracy of atomic clocks in any way dependent on the speed of light for example, if the speed of light were to speed up slightly, would that somehow speed up the frequency of oscillations of caesium used in an atomic clock or would those 9 billion. So, if it were possible to travel in a spaceship at, say, 995% of the speed of light, a hypothetical observer looking in would see the clock moving about 10 times slower than normal and the astronaut inside moving in slow-motion, as though through treacle.