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Author Topic:   How is the Universe here?
lyx2no
Member (Idle past 2974 days)
Posts: 1277
From: A vast, undifferentiated plane.
Joined: 02-28-2008


(1)
Message 124 of 131 (505878)
04-19-2009 12:54 AM
Reply to: Message 123 by AustinG
04-18-2009 8:35 PM


Re: Time as dimension
Welcome AustinG

You're correct in your example. If observers on the Sun, Mercury and Earth each had a synchronized Timex then a solar flare happening at four o'clock on the Sun observers watch would be seen to happen at 4:03 on the Mercury observers watch and at 4:08 on the Earth observers watch. And each would know at what time it happened on the other observers watches. No big deal.

But now lets give them all super accurate atomic clocks synchronized At Venus' north pole. The Sun observer would have to include a correction for his clock being slow due to the Sun's enormous gravitational field. The Mercury observer would have to include a correction for his clock being fast due to Mercury's rapid orbit. The Earth observer has to account for his gravity changing over the course of the day as the Moon changes position in the sky. More to the point, they each have to take into account on their very accurate clocks every acceleration they don't share in common. Accelerations warp space-time.


Genesis 2
17 But of the ponderosa pine, thou shalt not eat of it; for in the day that thou shinniest thereof thou shalt sorely learn of thy nakedness.
18 And we all live happily ever after.

This message is a reply to:
 Message 123 by AustinG, posted 04-18-2009 8:35 PM AustinG has responded

Replies to this message:
 Message 125 by AustinG, posted 04-20-2009 1:01 AM lyx2no has responded

  
lyx2no
Member (Idle past 2974 days)
Posts: 1277
From: A vast, undifferentiated plane.
Joined: 02-28-2008


Message 126 of 131 (505940)
04-20-2009 10:23 AM
Reply to: Message 125 by AustinG
04-20-2009 1:01 AM


Habits
Because there is nothing particularly special about a clock. A clock is merely a device for accounting a sequence of events in time. As a person of habit can be used to set ones watch by, cesium atoms are only of a more stringent habit.

Cosmic ray particles slamming into our upper atmosphere produce daughter particles that should decay before making it to the surface of the Earth. So how is it that they make it down here where we can measure them. By theory, if a daughter particle were moving at 87% of the speed of light — a real slow poke — it should "live" twice as long as we would expect if its time were the same as our own. And this is what is seen.

Are we measuring a changing habit of a particle or a habit of space-time? Take your pick. Either all particles and events without exception behave exactly as if time has changed for reasons only beknowst to themselves or time is not the same to all observers.

AbE: cavediver, I'm not really sure this is on topic or not because I'm not really sure I (come anywhere close?) understand what the topic is. There is something I vaguely recall about "Why is there something instead of nothing?" I don't know where that comes from… so why haven't I Googled it already? Let me Google it and get back to you with something worth the time (no pun intended). Thanks, I always like reading your stuff.

Edited by lyx2no, : Hit the topic somewhere.

Edited by lyx2no, : No reason given.


Genesis 2
17 But of the ponderosa pine, thou shalt not eat of it; for in the day that thou shinniest thereof thou shalt sorely learn of thy nakedness.
18 And we all live happily ever after.

This message is a reply to:
 Message 125 by AustinG, posted 04-20-2009 1:01 AM AustinG has not yet responded

  
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