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Light and Vision
Light and parts of human eye
Term | Definition |
---|---|
Sclera | The white of the eye |
Rods | The light sensitive cells that help to differentiate gray, white, and blacks |
Cones | The color sensitive cells that may be absent in some |
Retina | A multilayered membrane that covers the inside back of the eye that contains rods and cones |
Cornea | The front transparent layer that refracts the light first as it enters the eye. |
Aqueous Humor | A watery fluid that provides nourishment to the eye. |
Vitreous Humor | A gel like substance that maintains pressure and gives shape to the eye. |
Iris | The colored part of the eye that controls the amount of light |
Pupil | The hole through which the light enters the eye |
Optic Nerve | It sends messages from the eye to the brain |
Lens | Transparent biconvex structure that helps the eye to focus the image |
Reflection | When light bounces off an object |
Refraction | When light bends from one medium to another |
Diffraction | When wave bends around corners |
Opaque | Objects through which light can not pass through and is reflected or absorbed. |
Translucent | Objects through which light partially passes through |
Transparent | Objects through which light can pass through |
Convex | a surface that is curved outward (light waves become focused) |
Concave | Surface through which light waves spread out |