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I am working on a project about Ray tracing and I find myself stuck on 1 of the 5 questions my teacher has made.

1. The problem statement, all variables and given/known data

Explain how you can use Fermats principle to solve the formula of reflection and refraction.

2. Relevant equations

I do not now how I am going get from Fermats principle to a formula for reflection and refraction.

3. The attempt at a solution

I now that Fermats principle is: The path of a ray of light between two points is the path that minimizes the travel time.

I also know that the formula of refraction is:

Se picture

Now I can't get any father

Hope you can help me out a bit.

Regards

Morten

(sorry about my bad English but I am not native)

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# Homework Help: Fermats principle

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