When a ray of light is incident at normal incidence, (at right angles), to the surface between ... to calculate the refractive index. For the example above the refractive index \(n\) of the ...

Plot a graph of angle of incidence, i in o on the y-axis against angle of refraction, r in o on the x-axis and draw the line of best fit. We can see from the graph that as the angle of incidence ...