Clocks Definition and 244 Threads

In a place of gravity, where space time is bent "inward" clocks slow down from the prospective of an outsider. But what if you had a region of space time that was bent outward, what would happen to your clocks then?

Hello. I am trying to gain a more intuitive understanding of relativity, and hopefully someone may be able to help me. Suppose there are two light clocks on two different spaceships - ship A and ship B. If the two ships are moving past one another with a constant velocity, then an observer on...

Say there are two atomic clocks floating through space, both completely stationary with respect to each other. They are exactly synchronized, and not under the influence of any significant gravitating bodies. One is significantly farther ahead in the direction of motion than the other, but they...

If you had a tall tower on the equator and the tower had a clock at its base and a clock at the top would those clocks travel through time differently too each other? Let's say for example that one clock is at 1r from the centre of the Earth and the other is at 2r - just to get a significant...

Introduction I've been reading and thinking about special relativity recently and when I started to delve into relativity of simultaneity. I’ve seemed to of missed how relativity of simultaneity is compatible special relativity. I found it very difficult to describe this problem and it comes...

As 2 time pieces are moving relative to each other in a non accelerated reference frame, they will both see the other as slow. As time goes on, the amount of observed error in the other clock will continue to grow greater and greater. Let's say that after a while both clocks are 10 hours ahead...

If we have two clocks, one stationary at surface of Earth, and the other one very slowly moved at the surface of Earth, in the direction of Earth rotation, the clock that made the trip should be running ahead of the same stationary clock once it makes a complete circle and stops where it started...

Homework Statement Observers S and S' stand at the origins of their respective frames, which are moving relative to each other with a speed of .6c. Each has a standard clock, which, as usual, they set to zero when the two origins coincide. Observer S keeps the S' clock visually in sight...

Imagine I were to make a light clock by placing two mirrors facing each other, with a photon bouncing between them vertically, such that one complete round trip for the photon takes exactly one second. I understand that if this contraption were moving horizontally at significant speed, an...

As I understand it, clocks run relatively slower the closer they are to the center of a "gravity well" and also each other clock for a pair of observers moving relatively to each other appears to be running slower, relative to each frame of reference. So, start with a pair of highly accurate...

I am trying to understand how relativity explains that clocks all over the globe count at about the same rate at sea level. One of the papers that I have looked at is "The global positioning system, relativity, and extraterrestrial navigation" at...

Hello, I want to make these questions as simple as possible, so that no one answering it will have to use any mathematics or formulas to explain it. I don’t mean this in a disrespectful way, I’m simply interested in the specific issues. Assume that I am an observer on earth, and a...

In this hypothetical, an experiment is going to be conducted concerning the repositioning of clocks. two clocks are placed at the leading end of a vessel, that is 1 light second long, to an observer at rest relative to it. This vessel is shot into space from an observation station at...

So I am reading about how an atomic clock works , So they shoot microwaves at cesium atoms and the right microwaves will cause an electron to jump up to the next energy level , are they using this to tune the microwave laser so they know what the frequency of the laser is . and when they...

Do clocks tick at different rates in different magnetic fields .

Consider the following properties of SR clocks. The coordinate systems are the usual K( X,Y,Z,T) and k( x,y,z,t) where k is the coordinate whose origin moves in the positive direction of K. 1.The clocks of K are synchronized with each other using the procedure given in the 1905 paper. Also...

Homework Statement Assume you have a symmetrical clock at 100MHz. Design a logic circuit with four outputs of clocks at 100MHz, 50MHz, 25MHz, and 12.5MHz. The logic circuit should have 2 inputs to select output clock rate. Homework Equations N/A The Attempt at a Solution For...

A simple question, but I wonder how different people think of this wrt internal vs external clocks. It's been argued rightfullly that a satisfactory formulation of a measurement theory that is to be consistent with gravity (I use this word intead of QM, to not confused current QM with a...

Something just occurred to me today. I've puzzled for some time why it is that normal clocks tick slower when in a deeper depth of gravity but that pendulum clocks do the opposite and actually tick faster when in a deeper depth of gravity. Can time tick slower and faster? I believe I now...

Imagine in empty space a pendulum consisting of a small weight suspended above a large weight and displace so that it swings back and forth with period T. Now imagine accelerating (in the right direction) so that the effective gravity felt by the small weight increases. The period will then...

I read this somewhere on a physics forum recently What is meant by this statement? I spent a short while thinking about it but can't follow what the person is going on about. Maybe I misunderstood him, but he seems to be claiming that time dilation is actually an illusion.

Hi, I chanced upon https://www.physicsforums.com/showthread.php?t=321935 and read Doc AI's reply basically saying: if 2 bodies moving near speed of light relative to each other, the clocks on the other body will appear slower on either body. And I think this should theoretically mean the...

From "The conceptualization of time and the constancy of the speed of light", Vasco Guerra and and Rodrigo de Abreu. I just came across this article which proves that the speed of light had to be constant by just assuming "good" clocks record time correctly irrespective of orientations...

We have two clocks, A and B. B is moving with constant velocity with respect to A. From the reference frame of A, B is running slow. From the reference frame of B, A is running slow. Why is this not a paradox?

I'm reading Concepts of Modern Physics by Beiser, and the chapter example says: A spacecraft is moving relative to earth. An observer finds that in one hour, according to her clock 3601s elapse on the spacecraft 's clock. What is the craft's velocity relative to earth? (This is not a...

Hi. I've been reading about relativity and time dilation. Also watched some visualisations on youtube. The question I have is about the light clocks which are always used to demonstrate the theories. Explanations always show the light beam on the moving clock moving in a diagonal motion...

I was thinking that as far as I know, an atomic clock, and a mechanical clock, or a tuning fork clock might be affected differently by gravitation and acceleration. Is there any experimental verification of this? I'm trying to figure out if atoms will decay faster and that is it. Or if...

Can someone look at the attachment and tell me where I went wrong thanx

if you at rest wrt 2 clocks and then you synch the 2 clocks and then you move one of the clocks will they still be synchronised according to you?

Are atomic clocks such as the NIST-F1 Cesium Fountain Atomic Clock http://tf.nist.gov/cesium/fountain.htm" sensitive to the ambient temperature Or do they keep very accurate time regardless of the ambient temperature?

What is the reason chips won't go above 5GHz nowadays, independtly of the micro archicteture? Special cooling makes them go a little bit above, but it's always around this scale. Until 2002 computers were increasing frequency in every generation of produts, but it mostly stopped since then. Why?

The Fitzgeral-Lorentz transformation equations describe what is the time, e.g., the timecount, of a clock which has been accelerated or decelerated from an initial reference frame into a different reference frame. If two identical clocks, C1 and C2, are in an initial reference frame, K, and C2...

i'm revising for an exam and have this question posed (this isn't homework) what is the maximal velocity for a clock being transported from london to new york if the time difference to a stationary clock should be less than 10^-8 seconds. i'm not allowed to use calculators. i've tried...

Hello all. If two clocks are at rest relative to each other and are synchronized using the usual Einstein synch procedure, under what conditions will they appear to be unnsynchronized to another observer who has always been at rest relative to them? Also, if an observer previously moving...

Hey! I need to build 10 7segment clocks that will be synchronized among themselves. [Just a regular clock that will display the current hour, only 10 of those, and in different places in the room]. I thought about building a microProcessor-based clocks that will be synchronized among...

Each of the 24 GPS satellites holds four atomic clocks! Why four and not one or two? They are not cheap! Thanks

There are 2 identical 1m rulers (same rest length), and one if going past the other at some velocity. Each ruler has a clock every 10 cm. According to the fixed clock, the moving ruler's clocks will appear to be moving slow, and out of sync. (if t=0 when the rulers pass each other, then the...

Homework Statement Three digital clocks A, B, and C run at different rates and do not have simultaneous readings of zero. Figure 1-6 shows simultaneous readings on pairs of the clocks for four occasions: ___________312_________________512__ Clock A ___25______125_______200_______290__...

Four 12 hour clocks are lined up. The first reads 10:41 and loses 2hours and 24 minutes a day. The second reads 4:50 and loses 45 minutes a day. The third reads 3:45 and gains 1hour and 20 minutes a day. The fourth reads 1:05 and keeps perfect time. How long will it be before all four clocks...

People often have trouble visualizing how time dilation can be "mutual" in special relativity. That is, if you have two clocks moving with respect to each other, in each clock's rest frame the other clock runs slower. The following example illustrates how this can be possible without...

Hello all. I wonder if you could help explain something to me. No matter how much I read I am not sure if my understanding of special relativity is correct. My confusion is with respect to a light clock constructed as one mirror above the other and a photon reflecting between the two mirrors...

1. Absolute simultaneity with standard synchronized clocks In an one space dimensions approach we propose the following scenario. At the origin O of the inertial reference frame I we find a clock C0(0) and a source of light S(0). An observer R’ moves with constant speed V in the positive...

ok so u have two twins, both have clocks set to zero. One of them takes off at close to the speed of light. That twins clock would run slow. However If the twin were to reset both clocks and take of at the same speed in the opposite direction for the same distance. would the clocks be off by...

Referring to Fig A We have a spaceship in the spaceship is an observer at point D. There is also 4 identical clocks, clock 1 (C1), clock 2 (C2), clock 3 (C3) and clock 4 (C4). At the same point as the observer is a light so there is a light at point D as well. The observer also has...

Synchronising clocks Referring to fig 1 I want to synchronise two clocks. I have a spaceship traveling at v in the direction of the arrow. In the ship I have two identical clocks one at point A (clock1) and on a point D(clock 2). I also have a light source at point B. Length AB = length...

Hi all, I have recently been listening to one of Professor Richard Wolfson's physics lectures, and a question has occurred about an aspect of general relativity; that time 'slows down' in strongly curved spacetime. In this particular lecture, he mentions an experiment done some years ago in a...

if 2 clocks are synchronised in a stationary frame of refernece and then that frame of ref is accelerated up to a constant velocity will the clocks still be synchronised ?

I was wondering what is the definition of synchronised clocks...is it "2 clocks in a frame of reference that measure time at the same rate and appear to an observer within that same frame of reference to show the same time"

1. Let S be an x-coordinate system. The origin of S is located at x = 0m. Let S' be an x'-coordinate system. The origin of S' is located at x' = 0m. This information is not sufficient in order to determine where the origin of one system is located with respect to the other. 2. Let system S'...

In other threads the topic of how the proper time of a clock under acceleration has come up a number of times so I have decided to analyse this subject in a little more detail. For this analysis we have these conditions: a)Two clocks are initially at rest separated by a distance L_o along...