With an ideal corner cube, the reflected ray is precisely parallel to the incident ray. No corner cube will ever be perfect, however. The astronauts who visited the Moon left corner cubes so that scientists can do experiments in which light is reflected from the Moon and back to the Earth. Suppose one of these corner cubes has an angle of θ = 90.00001° (Fig. P24.11). By what distance will the reflected ray miss its target on the Earth?