Difference between revisions of "Forest UCM CoV"

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light takes the time <math>t</math> to travel between two points can be expressed as
 
light takes the time <math>t</math> to travel between two points can be expressed as
  
:<math>t = \int_A^B dt =\int_A^B \frac{1}{v} ds =</math>
+
:<math>t = \int_A^B dt =\int_A^B \frac{1}{v} ds </math>
  
  
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:<math>n=\frac{c}{v}</math>
 
:<math>n=\frac{c}{v}</math>
 +
 +
 +
:<math>t = \int_A^B \frac{n}{c} ds =</math>
  
 
== Euler-Lagrange Equation==
 
== Euler-Lagrange Equation==

Revision as of 01:15, 13 October 2014

Calculus of Variations

Fermat's Principle

Fermats principle is thatlight takes a path between two points that requires the least amount of time.


If we let S represent the path of light between two points then

[math]S=vt[/math]

light takes the time [math]t[/math] to travel between two points can be expressed as

[math]t = \int_A^B dt =\int_A^B \frac{1}{v} ds [/math]


The index of refraction is denoted as

[math]n=\frac{c}{v}[/math]


[math]t = \int_A^B \frac{n}{c} ds =[/math]

Euler-Lagrange Equation

Forest_Ugrad_ClassicalMechanics