On the plausibility of Superman's x-ray vision.
Requirements that a vision system must meet to make Superman 's x-ray vision possible are stated, and two solutions are proposed. In one, emitted x-rays carry the information to Superman 's eyes; in the other, emitted rays make objects transparent to a second type of ray. Further subjects lending themselves to this type of research are superhearing , the biomechanics of leaping tall buildings, or being faster than a bullet.
D005201:Fantasy; D006801:Humans; D011601:Psychophysics; D014792:Visual Acuity; D014796:Visual Perception; D014965:X-Rays