Register to reply

The meaning of time.

by ubcstudent
Tags: meaning, time
Share this thread:
ubcstudent
#1
Nov25-12, 05:00 PM
P: 4
If time is relative then what does it mean when they say the universe is 13.75 billion year old?
Phys.Org News Partner Physics news on Phys.org
New study refines biological evolution model
Fiber optic light pipes in the retina do much more than simple image transfer
Production phase for LSST camera sensors nears
Drakkith
#2
Nov25-12, 09:30 PM
Mentor
Drakkith's Avatar
P: 11,478
I believe the universe is 13.7 billion years old as per a clock on Earth. A clock at rest with respect to the CMB and away from any major gravitational sources would be SLIGHTLY faster. About 10 years faster by my estimate.
nasu
#3
Nov26-12, 08:11 AM
P: 1,970
Quote Quote by ubcstudent View Post
If time is relative then what does it mean when they say the universe is 13.75 billion year old?
Same as when we say "my car is 10 years old".

Myslius
#4
Nov26-12, 09:17 AM
P: 98
The meaning of time.

Drakkith, are you suggesting, that there is absolute space-time FOR? More or less equal to CMB?
(1 - sqrt(1 - (370/300000)^2)))*13.7*10^9
10419 years according to me.
Drakkith
#5
Nov26-12, 03:32 PM
Mentor
Drakkith's Avatar
P: 11,478
An absolute frame? No. But there is a frame that is at rest with respect to the CMB.


Register to reply

Related Discussions
Meaning of fictitious time Classical Physics 0
Meaning of Negative Time Calculus & Beyond Homework 13
What is the physical meaning for time? General Physics 6
No meaning to go backwards in time... Special & General Relativity 32
Meaning of time General Discussion 12