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The '''four-frequency''' of a [[photon]] is defined by
== 'Future Earth veins ==


:<math>N^a = \left( \nu, \nu \mathbf{n} \right)</math>
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where <math>\nu</math> is the photon's [[frequency]] and <math>\mathbf{n}</math> is a unit vector in the direction of the photon's motion. The four-frequency is always a future-pointing and [[Null vector (Minkowski space)|null vector]]. An observer moving with [[four-velocity]] <math>V</math> will observe a frequency
<ul>
 
 
:<math> \tfrac{1}{c}\eta(N^a,V) </math>
  <li>[http://www.lnqhsy.com/luntan/home.php?mod=space&uid=23957 http://www.lnqhsy.com/luntan/home.php?mod=space&uid=23957]</li>
 
 
Where <math>\eta</math> is the [[Minkowski Space#The Minkowski inner product|Minkowski inner-product]] (+---)
  <li>[http://chronocentric.com/forums/heuer/index.cgi http://chronocentric.com/forums/heuer/index.cgi]</li>
 
 
Closely related to the four-frequency is the '''wave four-vector''' defined by
  <li>[http://vugujranwala.com/vc/index.php?item/create_form/1 http://vugujranwala.com/vc/index.php?item/create_form/1]</li>
 
 
:<math>K^a=\left(\frac{\omega}{c}, \mathbf{k}\right)</math>
</ul>
 
where <math>\omega=2 \pi \nu</math>, <math>c</math> is the speed of light and <math>\mathbf{k}=\frac{2 \pi}{\lambda}\mathbf{n}</math> and <math>\lambda</math> is the [[wavelength]] of the photon. The wave four-vector is more often used in practice than the four-frequency, but the two vectors are related (using <math>c=\nu \lambda</math>) by
 
:<math>K^a=\frac{2 \pi}{c}N^a</math>
 
==References==
<references/>
*{{Cite book |title=Special Relativity |last=Woodhouse |first=N.M.J. |authorlink= |coauthors= |year=2003 |publisher=Springer-Verlag |location=London|isbn=1-85233-426-6 |pages= }}
 
{{DEFAULTSORT:Four-Frequency}}
[[Category:Minkowski spacetime]]
 
 
{{Relativity-stub}}

Revision as of 21:58, 1 March 2014

'Future Earth veins

Twist.

the ルイヴィトン 日本 Mighty alien ルイヴィトン限定財布 in ルイヴィトン バッグ 新作 their three channels lightning flight, the moment arrived after a mysterious area.

'rushing Wow ......'

a misty color space.

glance, I saw so many different タイガ ルイヴィトン colors of beads are endless slow suspended floating in space, with towering old Pu Ti, Luo Feng appear out of thin air within this space.

'This タイガ ルイヴィトン is one of the stars of the ルイヴィトン 財布 タイガ tower space.' towering old man, pointing to those suspended in the endless void of colored beads, 'Luo Feng, you know what these are?'

'Well?'

Luo Feng looked carefully, at first ルイヴィトン 柄 glance, dolphin colored drops, at first glance, enough to have a lot of one million, the number of one million, called the densely distributed throughout the endless ルイヴィトンルイヴィトン space, slowly suspension drift.

'This is the future of your planet a pulse.' towering old emotion.
'Future Earth veins?'
Luo Feng breath 相关的主题文章: