How does light let us see?

Question

Light is photons so how do those photons hitting our eyes let us know what things look like.

In: 0

Answer 1

The photons enter our eye, and hit the retina on the back of our eye. The rods, and cones in our retina detect the light, and convert it to electrical impulses that can be understood by our brain. Our brain does a whole lot of very complicated processing of these signals, but the ELI5 version is that we see because our brain understands these electrical impulses, and translates them into the images that we actually “see”.