Even I, a philosopher and not a mathematician, can tell this attempt at correction must be wrong for the second diagram shows the line going down and the first diagram shows the line going upwards. For the negative refractive index to be something unusual, the line must bend downwards i.e. the opposite way from the usual refraction shown in the top diagram.
Even I, a philosopher and not a mathematician, can tell this attempt at correction must be wrong for the second diagram shows the line going down and the first diagram shows the line going upwards. For the negative refractive index to be something unusual, the line must bend downwards i.e. the opposite way from the usual refraction shown in the top diagram.