On a boring day, a person playing with a Laser pointer suddenly noticed that this little point of light seemed to have some uncanny and magical properties for domestic cats. The cold, lazy cat chases the blip like it's behind a stimulant, even though it's on a wall. In short, cats have no resistance to exercise and charm. Once their gaze is drawn, they instinctively follow. In terms of why you can't catch him, you still want to catch him, the retina is one of the most important structures in the eye in terms of the way. It is made up of two types of cells: stem cells and cones. The eyelids process weak light and recognize movement, while the cone helps the eye see color. That means we see a world where cats' eyes have more cells to look at and see, as well as cone-shaped cells, so they can pick up very subtle movement information.
For cats, moving points of light, such as pausing, separating and accelerating, such as live and experienced prey, can facilitate hunting. To enhance this visual stimulation and capricious temptation, mouse-like laser disease appears on the market. While cats are particularly obsessed with red spots photographed with laser disease, it almost certainly has nothing to do with color, since cat eyes have no sensitivity to color. Cats can see white or yellow spots. In addition, cats' brains process visual information differently than those of people who are relatively sensitive to movement.
Why can the red laser pointer used in conferences and so on go to this day? And why is it red? Is the blue laser or green laser pointer useless? This is the direction I know. A "laser" emits light of a single wavelength with directivity. Since it does not diffuse in all directions like ordinary light sources, it can reach far away. "Laser light does not travel or travel a long distance, it is likely or converge to a small spot. Since most colors can be distinguished, it tends not to think that there are more color coding in the indistinguishable places. Therefore, you The color coding may not be noticed. People who are color-blind cannot handle well the "color names" (color categories) created to match the color vision of non-color-blind people. As a result, communication using color names becomes difficult.