Refraction is a little harder to understand, it is the bending of light as it goes through the new substance, and it is here that the importance of the normal line becomes evident. With respect to the normal line in the water, which way is the light bent (i.e. is the lights NEW path that it actually follows a. closer to or b. further from the normal line in the water than its original, unbent, path would have been)? This will always be the case when going from a less dense medium to a more dense medium. ii.While we could measure with protractors, and there is a mathematical relationship that would help us solve the amount of bend, it requires trigonometry (Snell's Law, if you want to knock yourself out) and so will not be discussed here. However, as you move the light source around, what can you say about the amount of bend compared to the steepness of the angle that the initial light ray comes in at? iii. Now move the slider for the index of refraction for the water (the lower box).The index of refraction is a measure of how thick/dense the substance is and how much it slows down light. What is the relationship between the index of refraction and the amount of refraction (bend) that occurs