A material that does not allow light to pass through it is ________________.
opaque
A material that lets light pass straight through it is __________________.
transparent
If a material lets light pass through it, but you cannot see objects on the other side of it, that material is __________
translucent
Light always travels in a _______________line.
straight
_____________light is a mixture of colored lights.
White
If all of the colors of the spectrum are absorbed by an object, that object is ________________.
black
Bending of light rays as they enter a new material is called _______________
refraction
The electric light bulb was invented by ________________
Thomas Edison
The transparent layer covering the front of the eyeball is the __________________.
cornea
The opening that lets light enter the eye is the ___________.
pupil
The muscles that regulate the size of the pupil are found in the _____________.
iris
The light-sensitive lining covering the inside of the eyeball is the ______________.
retina
The structure behind the pupil that refracts and focuses the light it receives is the ______________.
lens
The large bundle of fibers that carries the message of what the eye has seen to the brain is the ______________.
optic nerve
