Is Proper Time=0 Equivalent to Saying Proper Time Doesn't Apply?

  • Thread starter Nick666
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In summary: But I was wondering if a clock can travel at the speed of light or even faster than speed of light relative to another frame due to cosmological expansion. I know this may sound completely absurd but I don't know of any law of physics that prevents me from attaching a clock to an extremely long piece of wire, attaching the other end to a planet far away and then waiting for expansion to make the planet start to move away from me faster than speed of light. When the clock starts to move, it will be traveling at some point, past some objects, at the speed of light or greater.
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Nick666 said:
Just so I don't open another thread.

If the photon doesn't have a referential frame, and relativity says the laws of physics are the same in all referential frames, can't one say that the laws of physics are ...not...the same for the photon ?
No, because when someone says "the laws of physics are the same in all reference frames", they are being a bit sloppy with the English language. It would be more accurate (but sounds clumsier, which is why we don't often say it this way) to say "The law of physics produce the same results no matter what reference frame you use to assign times and positions to events". Phrased this way, it is clear that the aws of physics apply to everything, whether we can find a reference frame in which it is at rest or not.
 
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<h2> Is proper time equal to zero?</h2><p>No, proper time is not equal to zero. Proper time is a measure of time in a specific frame of reference, and it can have different values depending on the observer's perspective.</p><h2> Can proper time be zero?</h2><p>Yes, proper time can be zero in certain cases. This occurs when an object is moving at the speed of light, as time dilation causes proper time to approach zero for the moving object.</p><h2> Does proper time apply in all situations?</h2><p>No, proper time does not apply in all situations. It is only applicable in situations where there is a single, consistent frame of reference. In situations involving acceleration or multiple frames of reference, proper time may not be applicable.</p><h2> How is proper time related to the theory of relativity?</h2><p>Proper time is a fundamental concept in the theory of relativity. It is used to describe how time is experienced by objects in different frames of reference, and it is a key component in understanding the effects of time dilation and the relativity of simultaneity.</p><h2> Is proper time the same as coordinate time?</h2><p>No, proper time and coordinate time are not the same. Proper time is the time experienced by an object in its own frame of reference, while coordinate time is the time measured by an observer in a different frame of reference. They can have different values due to the effects of time dilation.</p>

FAQ: Is Proper Time=0 Equivalent to Saying Proper Time Doesn't Apply?

Is proper time equal to zero?

No, proper time is not equal to zero. Proper time is a measure of time in a specific frame of reference, and it can have different values depending on the observer's perspective.

Can proper time be zero?

Yes, proper time can be zero in certain cases. This occurs when an object is moving at the speed of light, as time dilation causes proper time to approach zero for the moving object.

Does proper time apply in all situations?

No, proper time does not apply in all situations. It is only applicable in situations where there is a single, consistent frame of reference. In situations involving acceleration or multiple frames of reference, proper time may not be applicable.

How is proper time related to the theory of relativity?

Proper time is a fundamental concept in the theory of relativity. It is used to describe how time is experienced by objects in different frames of reference, and it is a key component in understanding the effects of time dilation and the relativity of simultaneity.

Is proper time the same as coordinate time?

No, proper time and coordinate time are not the same. Proper time is the time experienced by an object in its own frame of reference, while coordinate time is the time measured by an observer in a different frame of reference. They can have different values due to the effects of time dilation.

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