Wall Street analysts routinely fail this basic physics test. The reality is 0.1 millimeters. The maximum allowable surface error is 50 picometers. That is roughly the radius of a single hydrogen atom. Physical manufacturing has merged with quantum mechanics. Reflecting the light is merely half the problem. Generating it requires an act of calculated industrial violence. Extreme ultraviolet light is fragile. It is absorbed by almost everything. Even regular air kills it. The machine must operate in a hard vacuum and generate plasma by shooting 50,000 microscopic droplets of molten tin every single second with a high power industrial laser.