Light, sight and the eye

Cards (12)

Light travels at 300,000,000m per second
Faster than sound
Opaque is a... 
Material that doesn't let travel through
Translucent is a... 
Material through which a glow of light can be seen
Luminous is... 
A object that creates light
Non luminous is.. 
An object that doesn't create light
What is the cornea ?
A transparent layer on the eye that allows light to enter the eye
What is the lens in an eye ?
Is transparent and focuses light onto thr retina
What is the ciliary muscle ?
A muscle in the eye that changes the lens to help focus the light on the retina
What is the retina ?
The lining of the back of the eye which contains light reception
What is the optic nerve ?
Bundles of neurones which carry electricity impulses from the eye to the brain
What is the pupil ?
The opening in the eye that light passes through
What is the iris ?
Muscle that contracts and relaxes to control the amount of light entering the eye