Light is a very cool thing. It only travels in straight lines and reflcts off everything some objects better than others e.g smooth, shiny surfaces

reflect better than rough,dark sufaces.Light can travel faster than anything else and can get to the moon in 1.3 seconds.Light also travels at 186,000 miles per hour.

LIGHT

We see by light shining into our cornea (which is transparent)then the light shines through our pupil

onto our lense which focusses our sight.Then it goes to the retina and the retina sends a message to

the optic nerve which sends a message to our brain and then we see.Ther is also the iris which makes

our pupil bigger when there is less light and smaller when there is more light.It does this to try and

let more in and and less light in.