... of how this experiment is going to work can be seen below. To find the refractive index of the glass that I will be using in the actual experiment, I set up a glass block that was of the same type of glass as the prism, and lined up sighting pins through it. This enables me to draw the angle of incidence (measured from the Normal (dotted line below), a line at 90° to where the incident ray strikes the glass block) and this also enables me to draw the angle of emergence (where the light exits the prism). I then would connect both the lines up and draw the path, which the ray actually takes through the prism (the refracted ray). After this I would measure the refracted ray, again the is measured from the same normal, and then I would use Snells Law to calculate the refractive index of ...

See this essay or coursework document in full right now