#questionsofscience 1

Answer : YES
« In order to see, eyes need to turn light into nerve signals, and for this the light needs to be absorbed in the first place. And eyes couldn’t absorb light if they were invisible! All this is, because everything we see is carried by light. Light contains all the images of the world. People did not always know that, about a thousand years ago many thought seeing is sending out rays for capturing images, until the scholar Alhazen wrote the first book on empirical, fact-based science (The Book of Optics) in which he proved that seeing means capturing light. Seeing is retrieving. »
Prof. Ulf Leonhardt - Weizmann Institute of Science

published on 10/05/2018