Assume a transparent rod of diameter d = 2.00 µ m has an index of refraction of 1.36. Determine the maximum angle for which the light rays incident on one end of the rod as shown in the figure is subjected to total internal reflection along the walls of the rod. Your answer defines the size of the cone acceptance of the rod.
A rod with its long axis in a horizontal orientation and of diameter 2.00 µm is shown. A horizontal, dashed line cuts through the center of the rod. A beam moving up and to the right strikes the left end of the rod at an angle 𝜃 with the horizontal.
