没有眼睛的宇宙，需要可见光吗？

The entire electromagnetic spectrum spans about twenty orders of magnitude, with the portion visible to the human eye occupying only 0.035 ten-thousandths of a percent. If you imagine the entire spectrum as a flight route from Beijing to New York, our visible light is roughly the distance you move your seat slightly. What's so special about visible light? If there were no eyes in the universe, would it need visible light? In this episode, we'll break down the term "visible light": Light is electromagnetic radiation, obeying Maxwell's equations; gamma rays and radio waves are not inherently superior or inferior in physics. The word "visible," however, describes a relationship between electromagnetic radiation and rhodopsin, a photosensitive protein. We'll also debunk a widely circulated misconception—that the solar peak radiation doesn't naturally fall within the visible light spectrum. The real reason is the light-transmitting window of liquid water; the water selects the visible light, and the eye simply follows the water. Looking at the sixteen photoreceptors of mantis shrimp, the infrared pits of vipers, and the ultraviolet patterns in the eyes of bees, you'll find that "visible light" has fundamentally different definitions in different species. Following this line of thought, we will re-examine this translation using the three natures of Yogacara philosophy—the nature of conceptualization, the nature of dependent origination, and the nature of perfect reality; we will use neuroscience's sensory qualities and David Chalmers's problem of consciousness to question why color cannot be found as a corresponding variable in physical equations; finally, we will return to physicist Wheeler's delayed-choice experiment and the participatory universe hypothesis to see if a universe without observers can possess a definite history. If this episode has sparked your curiosity about the relationship between consciousness and matter, please leave a comment sharing your thoughts, and feel free to share this episode with friends who also ponder these kinds of questions. I'm Wang Lijie, see you next time. Full work page for this episode (article, video download, script, subtitles, scene images PDF): https://macroalpha.io/archive/bPDMFyi...