light and the human eye
how light bends concave and convex lens
Concave inwards
Convex outwards
how light bends
Light goes faster out of dense
Light goes slower in dense
cornea
cornea focuses on light
iris
controls how wide the pupil is and how much light can pass into your eye. bright light iris narrows pupil to reduce sight of light, dim light widens the pupil to let in more light.
lens
focuses the light in our eye to see things clearly.it flattens to see things far, and bends to see things close.
retina to optic nerve
The retina has cells that detect light they turn it into electrical signals which go to the optic nerve which is like a cable connecting the retina to the brain.
retina
The retina creates a rough image that’s upside down it’s our brains that turn it around