5CH - Refraction

Finished the first lesson on refraction today. It is the refractive index (n) that determines how much refraction occurs. This is expressed as a number with no units. We proved the equation for this and looked at the couple of different ways that the equation can be written. It is very important to make sure that the angle in the least dense medium is 'on the top' of the equation. This is the only way that the refractive index will always be greater than 1.