Science Forum
Welcome to the science forum!

Please log in or sign up to continue

Science Forum
Welcome to the science forum!

Please log in or sign up to continue

Science Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.


Inspiring young minds
 
HomeHome  GalleryGallery  Latest imagesLatest images  SearchSearch  RegisterRegister  Log inLog in  
March 2024
MonTueWedThuFriSatSun
    123
45678910
11121314151617
18192021222324
25262728293031
CalendarCalendar
Latest topics
» Dead Space 3 Awakened Pc Rar Mega
Special Relativty Primer I_icon_minitimeWed Feb 19, 2014 12:00 am by aleaesb

» Baby_Squad_Investigators_2013
Special Relativty Primer I_icon_minitimeTue Feb 18, 2014 4:00 pm by aleaesb

» Suikoden 2 Exe Free
Special Relativty Primer I_icon_minitimeSat Feb 15, 2014 7:21 pm by aleaesb

» Twilight Breaking Dawn Part 1 Full Movie In Hindi Downl...
Special Relativty Primer I_icon_minitimeFri Feb 14, 2014 10:26 pm by aleaesb

» Download Smadav 9.4
Special Relativty Primer I_icon_minitimeFri Feb 14, 2014 9:46 pm by aleaesb

» Jokes corner
Special Relativty Primer I_icon_minitimeTue Dec 06, 2011 11:28 am by Asad

» My forum?
Special Relativty Primer I_icon_minitimeMon Oct 31, 2011 9:05 am by Ani

» Am Back
Special Relativty Primer I_icon_minitimeSun Jan 09, 2011 8:14 am by Ani

» Some handy links
Special Relativty Primer I_icon_minitimeSat Sep 04, 2010 9:36 am by Prest^

Search
 
 

Display results as :
 
Rechercher Advanced Search
Latest topics
» Dead Space 3 Awakened Pc Rar Mega
Special Relativty Primer I_icon_minitimeWed Feb 19, 2014 12:00 am by aleaesb

» Baby_Squad_Investigators_2013
Special Relativty Primer I_icon_minitimeTue Feb 18, 2014 4:00 pm by aleaesb

» Suikoden 2 Exe Free
Special Relativty Primer I_icon_minitimeSat Feb 15, 2014 7:21 pm by aleaesb

» Twilight Breaking Dawn Part 1 Full Movie In Hindi Downl...
Special Relativty Primer I_icon_minitimeFri Feb 14, 2014 10:26 pm by aleaesb

» Download Smadav 9.4
Special Relativty Primer I_icon_minitimeFri Feb 14, 2014 9:46 pm by aleaesb

» Jokes corner
Special Relativty Primer I_icon_minitimeTue Dec 06, 2011 11:28 am by Asad

» My forum?
Special Relativty Primer I_icon_minitimeMon Oct 31, 2011 9:05 am by Ani

» Am Back
Special Relativty Primer I_icon_minitimeSun Jan 09, 2011 8:14 am by Ani

» Some handy links
Special Relativty Primer I_icon_minitimeSat Sep 04, 2010 9:36 am by Prest^

Navigation
 Portal
 Index
 Memberlist
 Profile
 FAQ
 Search
Forum
Affiliates
free forum
   

 

 Special Relativty Primer

Go down 
2 posters
AuthorMessage
Ani
Admin
Admin



Posts : 99
Points : 151
Join date : 2010-06-07

Special Relativty Primer Empty
PostSubject: Special Relativty Primer   Special Relativty Primer I_icon_minitimeMon Jul 12, 2010 11:25 am

Special Relativity comes up a lot here, and I've noticed that there is a lot of variation in some of the "explanations" of it I've seen here. Therefore, I thought I'd try to clear up some of the confusion with a step by step walk through some of the main concepts, concluding with how they all fit together to explain everybody's favorite punching bag: "The Twin Paradox".

Since some people's eyes glaze over when they see a bunch of equations, I'm going to try do it without the math.


1. Inertial frames of reference

Essentially, this is any frame of reference which is not accelerating. Imagine An astronaut(A) floating in space far away from any gravity source. His can be said to be at rest according to a inertial reference frame (We'll call this "A's frame"). If we add another astronaut(B) with a relative motion with respect to A, He is moving in A's frame, But is motionless according to another frame(B's frame).

So in A's frame, A is stationary and B is moving, and in B's frame A is moving and B is stationary.

We can choose from an infinite number of inertial reference frames, all of which A
and B would have different velocities, What frame of reference we use for any situation depends on which is more convenient.

One point about reference frames is that they are not the same thing as "point of view". A point of view is attached to an object or observer, a frame of reference is not. If A accelerates, his "point of view" goes with him, However, the frame of reference we originally called A's frame does not. Instead, after the acceleration, A is now motionless with respect to a different frame (A's new frame) and is in motion with respect to his old "A's frame".

(While accelerating, A is in what is known as a non-inertial reference frame. All you need to know about this right now is that that rules for dealing with non-inertial frames differ from those dealing with inertial frames.)


2. The postulates of Relativity

SR is built on two postulates:

1. The laws of physics is the same for all inertial reference frames.
2. The speed of light is a constant for all inertial frame.

The first simply means that there is no physical experiment that can distinguish between two reference frames. Any experiment you perform at rest with respect to one frame gives the same results as a those done at rest in a frame moving with respect to the first.
The result is that there is no "preferred" inertial reference frame. You can't say who is "really" moving and who is "really" at rest.

The second state that the speed of light in one of these physical laws that is the same for all inertial reference frames. And when we mean that the speed of light is "constant" we mean relative to the inertial frame from which it is being measured.

Example, going back to our astronauts A and B. Assume that their relative velocity is towards each other (A see's B approaching him and B see's A approaching him).

A flash of light occurs at a point of light between them.

The following animation shows how events occur in A's frame with the expanding circle representing the flash of light.Special Relativty Primer Invara
Back to top Go down
https://science-forum.forumotion.com
Prest^
Admin
Admin
Prest^


Posts : 76
Points : 94
Join date : 2010-07-16
Location : usa where else?

Special Relativty Primer Empty
PostSubject: Re: Special Relativty Primer   Special Relativty Primer I_icon_minitimeThu Jul 29, 2010 6:08 am

yeah tis nice. i didnt really like realitivity in science but now i knida do. bounce
Back to top Go down
Ani
Admin
Admin



Posts : 99
Points : 151
Join date : 2010-06-07

Special Relativty Primer Empty
PostSubject: Re: Special Relativty Primer   Special Relativty Primer I_icon_minitimeThu Jul 29, 2010 9:38 am

Really the things i like,U NEVER like it..Why the hell LOL!So easy and so... tongue
Back to top Go down
https://science-forum.forumotion.com
Prest^
Admin
Admin
Prest^


Posts : 76
Points : 94
Join date : 2010-07-16
Location : usa where else?

Special Relativty Primer Empty
PostSubject: Re: Special Relativty Primer   Special Relativty Primer I_icon_minitimeFri Jul 30, 2010 11:50 am

Razz lol
Back to top Go down
Sponsored content





Special Relativty Primer Empty
PostSubject: Re: Special Relativty Primer   Special Relativty Primer I_icon_minitime

Back to top Go down
 
Special Relativty Primer
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
Science Forum :: Physics-
Jump to: