City lights on nature. But lets start at the beginning with how we see light. When light enters our eye it hits the retina. And is received by folks who are receptive cells the socalled rot cells respond to light and dark the cones are responsible for color vision but we only see the light that actually enters our eyes if you are in zambia wanted to know more. Trouble. During a thunderstorm or you see the lightning straight away but we hear the thunder. Thats because some. Waves move slowly whereas light travels super fast at 300000 kilometers per 2nd. It maintains that speed in space where theres a vacuum and it moves only slightly slower through the earths atmosphere but other media slow down for example water in which it travels at a mere 225000 kilometers a 2nd. Life travels like ripples spreading on the surface of a liquid in all directions simultaneously. And in Straight Lines which is why we talk of light rays sometimes its even possible for us to see the. Light that does not st