What is Snell's Law and How is it Used?

[grscott_2000]

I have been asked to "state snells law"

I know the equation is

sin i / sin r = n2/n1

And I know how to use it...

But is there a written law for this that I'm missing? (As in Newtons third law of motion states that...?)

 

[malawi_glenn]

well explain in words what is happening when you use Snells law. And maybe some applications of it.

 

[Doc Al]

I don't know the full context of your question, but why wouldn't giving an equation be a form of "stating" a physical law? Assuming that you've defined the symbols used.

 

[grscott_2000]

I was just wondering if there was a formal statement that I was missing here. My textbooks indicate that the equation is the law, but you're right, there's nothing wrong with giving it in that form. As usual, many thanks.