Snell's Law
In the previous blog post I talked briefly about Snell's law, however, I couldn't cover this topic due to the fact that I did not know the maths required. Guess what! I know them now. Well, at least at a basic level. Let's get into it. The thing I needed to learn was the "sine" of an angle. The cool thing is that in a right-angle triangle, like the one below, if you take one side of the right-angle ("a" below) and divide it by the opposite side of the right-angle ("h" below) then you get same number no matter what size the triangle is. As you can see a1/h1 is 0.708 and so is a2/h2 almost perfectly. This number is called the sine of the angle O1. By the way "h" is called the hypotenuse ... who came up with that name! I have learnt how to work with a table of sines to calculate the sine of an angle. I use this one from NASA . So, now we can understand Snell's law. It predicts how much the light will bend when it changes media based...