C3 practical: Refractive index
In this practical the refractive index of a glass (or perspex depending on what you choose) block will be found by measuring the angles of incidence and refraction for a ray of light passing through it. According to Snell's law, for a ray of light passing from air into glass the ratio is a constant equal to the refractive index of the boundary. Since the refractive index of air is approximately 1 we can take this to...