Light Facts
A shadow is made when an object blocks light. The object must
be opaque or translucent to make a shadow. A transparent
object
will not make any shadow, as light will pass straight through it. ...
Shadows made by the Sun.
After light has been reflected off an object, such as a tree or a book, it still travels in straight lines, but in a new direction. If the light enters our eyes, we see the object. We can see things such as books and trees because of the light that is reflected off them.
The light source that you have such as a torch bounces off an
object in front of it ito our eyes.But if you only have a light
source and no object in front of it then the light goes straight into your eyes.
The cornea of an eye
is transparent so that
the light can get in.
The iris of an eye lets
less light or more light.
The pupil of an eye just lets light in.
The lens of an eye
focuses the eye.
The retina of an eye
detecs the light that goes
into the eye.
The optic nerve of an eye
sends messages from the
eye to the brain