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Just like everything else, that would depend on who is looking at the watch,

and how the observer is moving relative to it. To the person wearing the watch,

it would appear perfectly normal, as it tick-tocked regularly and the hands moved

slowly. But to a stationary observer ... one with respect to whom the watch is

moving at light speed ... the watch would appear to have stopped --- just like

the heartbeat of the person wearing it!

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Q: How would moving at light speed affect a watch?
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What would happen if a train were traveling at the speed of light and on top of it was a moving car?

According to Stephen Hawkings (you can watch his study on time travel to answer this question) the speed of light is like the "speed limit" for the universe. Nothing exceeds the speed of light. So if you have a train that's travelling at the speed of light (which is impossible, it can travel close but not exactly at the speed of light), and a car is moving on top of it, isn't that technically breaking the "speed limit" or exceeding the speed of light? That's not possible, instead physics would "autocorrect" that and instead of having the car move fast enough to break the "speed limit", time would be slowed down, meaning the car would be slowed down, just enough so that it doesn't break the speed limit. Simply it means, if you were inside that car, time would be passing really slowly. While a week passes for the person in the car, one hundred years would pass in regular time.


How does time changes at speed of light?

At speeds approaching the speed of light, time slows down in two ways, which in actuality are the same way observed from two frames of reference. If you're standing still and something is moving close to the speed of light relative to you, time is slower for it. If you're moving at close to the speed of light and everything else is standing still, time is still slower for everything else. Why? Because if you change reference frames from the objects that are standing still's point of view back to your point of view, then it is no longer you that is traveling close to the speed of light, but is in fact everything else that is. This effect is called time dilation, and has been experimentally verified time and again. The equation to measure how much slower time passes for different reference frames is actually quite simple: Δt' = Δt/√[1 - (v2/c2)], where v is the relative speed of what's moving compared to that of a stationary observer, c is the speed of light, Δt is the time elapsed by the observer's watch, and Δt' is the time that has elapsed by the object that is moving's watch.


If youre in a vehicle going the speed of light what happens when you turn on the headlights?

Technically, this question is flawed, since one of the most important rules in physics is that no matter that has mass can travel at or above the speed of light (this is why scientists argue that traveling back in time is impossible) you would need extreme force and very special circumstances. However, for hypothetical purposes, lets say that you are able to reach the speed of light. When you turn on your headlights, nothing out of the ordinary will happen. You will merely see the light speed away from you at the speed of light. It would be the same as if you were standing still in your car and turned on the headlights. This is one of the must incredible things about the speed of light (c) - it is constant for everybody. Even if you were an onlooker and you somehow saw the car go by, it wouldn't happen at twice the speed of light, it would still happen at regular (c). Going further, since the speed of the light viewed doesn't change, then what does? The time. If you are able to go near the speed of light (like .9999 times), time would go more slowly for you (compared to normal, but you wouldn't notice anything. If you look at the outside world, time would appear to be traveling faster. For example, going .9999 times the speed of light, traveling for one year would actually be 70 years for anyone else. If you were able to reach the speed of light, you will have esentially stopped time, and if you were able to go faster than the speed of light, there would be an inertial frame of reference in which you would be travelling back in time. This is actually a very touchy subject, i highly recommend reading more about it. There are some very interesting videos and books by Stephen Hawking on youtube that you can watch, both about light, relativity, time travel, all of that.


Does convection travel at the speed of light?

No but the leader that travels from the cloud to the ground travels at about 60 000 m/s. Light travels at 300 000 000 m/s. Note that the bright flash of lightning occurs on the return stoke and travels from the ground up to the cloud. Read the article on lightning at Wikipedia.org, 'The World's Encyclopedia'. The link is in the related links below.


Does a photon obey the rules of something traveling at the speed of light?

Obeying PhotonsPhotons by definition travel at the speed of light. They are unaffected by mass dilation since they have no mass, but are affected by time dilation: a photon could conceivably travel "forever" from our point of view since no time would pass from a photon's reference frame. So yes, they follow the rules along with everything else.

Related questions

How did physicist calculated the prise measurement of the speed of light?

Stop watch and a light switch


Why do you watch for smoke as opposed to the sound of the gun?

Speed of light is faster than speed of sound.


If you can travel at velocity of light then what happens to time?

If I pass you at the speed of light, then: -- I see my wristwatch moving normally; but you look at it as I pass you, and you say that my watch is not moving at all. -- You see your wristwatch moving normally; but I look at it as I pass you, and I say that your watch is not moving at all. You probably want to know what happens to "real time". I'm really delighted to be able to say that there's no such thing. Just like everything else, it's all relative, and depends on the relative motion of the observers.


What would happen if a train were traveling at the speed of light and on top of it was a moving car?

According to Stephen Hawkings (you can watch his study on time travel to answer this question) the speed of light is like the "speed limit" for the universe. Nothing exceeds the speed of light. So if you have a train that's travelling at the speed of light (which is impossible, it can travel close but not exactly at the speed of light), and a car is moving on top of it, isn't that technically breaking the "speed limit" or exceeding the speed of light? That's not possible, instead physics would "autocorrect" that and instead of having the car move fast enough to break the "speed limit", time would be slowed down, meaning the car would be slowed down, just enough so that it doesn't break the speed limit. Simply it means, if you were inside that car, time would be passing really slowly. While a week passes for the person in the car, one hundred years would pass in regular time.


How does time changes at speed of light?

At speeds approaching the speed of light, time slows down in two ways, which in actuality are the same way observed from two frames of reference. If you're standing still and something is moving close to the speed of light relative to you, time is slower for it. If you're moving at close to the speed of light and everything else is standing still, time is still slower for everything else. Why? Because if you change reference frames from the objects that are standing still's point of view back to your point of view, then it is no longer you that is traveling close to the speed of light, but is in fact everything else that is. This effect is called time dilation, and has been experimentally verified time and again. The equation to measure how much slower time passes for different reference frames is actually quite simple: Δt' = Δt/√[1 - (v2/c2)], where v is the relative speed of what's moving compared to that of a stationary observer, c is the speed of light, Δt is the time elapsed by the observer's watch, and Δt' is the time that has elapsed by the object that is moving's watch.


Where can someone watch videos of fast moving cars?

One can watch videos of fast moving cars on YouTube. YouTube has a variety of different videos that show cars moving at high rates of speed, whether it's for stunts or just racing around a track to win a prize.


Does time fly when you're having fun?

The reason that time flys when youre having fun is because when your brain is moving at such speeds it is moving near the speed of light. Because it is moving at that speed, time realitive to the speed youre moving at, it seems to go by quickly because time slows realitivy to speed. ~ the above answer, I think it COMPLETELY WRONG, Im no scientist but I doubt any part of any function of the brain moves at anywhere close to the speed of light. I suppose the electrical impulses that travel through the synapses in the brain move at extremely high speeds but not close to the speed of light... I read about this, the reason why time flies when youre having fun is because when youre amused (and or busy) your brain has a lot to process, and it does not concentrate on the passing of time as much as when you are bored. when you are bored your brain notices the passing of time more than when it is stimulated, which equates to a more accurate perception of the reality of the passing of time. this is evident at least to me, when im bored I watch the time more than when I am busy.


Is there a light or luminated hands on this watch?

No, this watch does not have light or illuminated hands.


Where can one watch some examples of moving wallpapers?

There are many places where one can watch some examples of moving wallpapers. One can watch some examples of moving wallpapers at popular on the web sources such as Map Crunch and App Advice.


If it takes 8 minutes for the light from the sun to reach earth as measured from earth and if you could ride a beam of light from the sun to the earth and time it would it take fewer minutes?

First, any object with mass (which includes you and me) cannot actually travel at the speed of light. But you can get very close, in principle. However, assuming you were moving very, very close to the speed of light, the time you experienced on board your ship would be exceedingly short. From the perspective of a photon itself, the trip time is exactly zero. The theory of Special Relativity gives us a way to calculate the trip time, and the equation includes a multiplier called the Lorentz Factor, which comes out to zero for the velocity of light. ========================================== If you and your brother are both wearing wrist watches, and you go flying past him ... the speed doesn't matter ... and as you pass him you both look at each others' watches, then you'll say that your brother's watch is running slow, and your brother will say that YOUR watch is running slow. You'll both be correct, and the faster you fly past him, the slower each of you will see the other's watch running. If it were possible for you to sail past him at the speed of light, then he would say that your watch has stopped, and you would say that HIS watch has stopped. Just as at any other speed, you would both be correct. I know it doesn't make sense, but it happens to be true. It's been observed thousands of times over the past hundred years or so. And a correction for it is built into the GPS system, to correct the clocks for the speed of the satellites. Otherwise GPS would give flaky and wrong results.


When was Watch Hill Light created?

Watch Hill Light was created in 1856.


If you watch a train go by at 20 meters per second at what speed with people sitting on the train be moving relative to you?

The people on the train are watching you go by at 20mps. It's all relative.