Go Back   Physics Help Forum > College/University Physics Help > General Physics

General Physics General Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Jul 4th 2015, 10:28 PM   #1
Member
 
Join Date: Jul 2013
Posts: 54
Time definition

Time is defined by the measure of length determined by each humans who make the time together. Each of us has our own theory as time that is done by each feeling(not illusion) for number as question answer. So this question number is all together to make the time theory as the definition of time. And we live on this gap as time to say we are together.
philipishin is offline   Reply With Quote
Old Jul 5th 2015, 07:59 AM   #2
MBW
Senior Member
 
MBW's Avatar
 
Join Date: Apr 2008
Location: Bedford, England
Posts: 668
Hello again, it has been quite a long time since your last post.
Your English phrasing is still a bit odd, but I think I can get the gist of it.

Human perception of time is subjective, influenced by the number and (personal) significance of the events we experience within the fleeting moments we have to appreciate the universe we find ourselves in.
Physicists have been struggling for generations to find a clean definition of this feature of the actual structure of the universe that we humans perceive as time.
The full answer still eludes us, but just perhaps there are a few glimpses appearing of the basic shape of the answer.

It should perhaps be noted that the precise definition of distance is also a surprisingly difficult concept to pin down, (it is often described in terms of time)
and as Einstein famously indicated distance (space) and time are intimately intertwined.
__________________
You have GOT to Laugh !
MBW is offline   Reply With Quote
Old Jul 6th 2015, 06:14 PM   #3
Pmb
Physics Team
 
Join Date: Apr 2009
Location: Boston's North Shore
Posts: 1,526
Originally Posted by philipishin View Post
Time is defined by the measure of length determined by each humans who make the time together. Each of us has our own theory as time that is done by each feeling(not illusion) for number as question answer. So this question number is all together to make the time theory as the definition of time. And we live on this gap as time to say we are together.
Time can't be defined but that doesn't mean that we don't know what it is. It's like energy. We don't know how to define that either but we understand it. In this case see:
http://users.wfu.edu/brehme/time.htm
Pmb is online now   Reply With Quote
Old Jul 8th 2015, 04:37 AM   #4
MBW
Senior Member
 
MBW's Avatar
 
Join Date: Apr 2008
Location: Bedford, England
Posts: 668
In the link offered by Pmb, the final paragraph indicates that, in the reference frame of a photon, there is zero elapsed time regardless of how far it travels.
This could be interpreted as suggesting that; for photons there is no such thing as time.
I guess, however, that photons do experience distance.
There will be a different number of phase cycles depending on the distance between source and destination.
__________________
You have GOT to Laugh !
MBW is offline   Reply With Quote
Old Jul 11th 2015, 12:06 PM   #5
Pmb
Physics Team
 
Join Date: Apr 2009
Location: Boston's North Shore
Posts: 1,526
Originally Posted by MBW
In the link offered by Pmb, the final paragraph indicates that, in the reference frame of a photon, there is zero elapsed time regardless of how far it travels.
No document is perfect and neither is that one. It's never correct to speak of time in the frame of reference of a photon or the time of a photon. There is no such rest frame to speak of and as such no frame in which to place a clock to measure the passage of time in that frame.

Originally Posted by MBW
This could be interpreted as suggesting that; for photons there is no such thing as time.
Photons most certainly experience time since they move from one place to another during a period of time.
Pmb is online now   Reply With Quote
Reply

  Physics Help Forum > College/University Physics Help > General Physics

Tags
definition, time



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
Definition of white light according to CIE magiclink93 Light and Optics 1 Nov 8th 2014 04:32 PM
I am confused on the concept/definition for center of mass and center of gravity? hongiddong Kinematics and Dynamics 3 Jul 30th 2014 10:36 AM
Definition of Torque? Do I have the right understanding? jlyu002 Kinematics and Dynamics 2 Jul 19th 2014 10:58 PM
Definition of a Magnetic Field Skyrim Electricity and Magnetism 2 Apr 25th 2011 09:01 PM
Is there a formula that relates frequency and time? By time, I don't mean period, jus rish Waves and Sound 3 Nov 22nd 2009 04:36 AM


Facebook Twitter Google+ RSS Feed