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chapter 30 pp #3
powerpoint questions 3
Question | Answer |
---|---|
What is the image formed by a camera? | upside down, inverted, and real. |
How is a camera different from the human eye? | cameras focus light for near and far objects |
As humans age our ability to what decreases and then our close vision decreases. | our ability to accommodate decreases. |
What is the shape of the lens in the human eye? | convex |
What is the center of sharpest vision? | the fovea |
Where is the image formed when a person is farsighted? | behind the retina |
what is the correction for farsightedness? | A converging (convex) lens |
What is the image formed when a person is nearsighted? | in front of the retina |
What is the correction for nearsightedness? | a diverging (concave) lens |
What is the correction for astigmatism? | lenses that adjust for the curvature of the cornea. |
What is cataracts? | when the lens becomes crystalized |
What is Sherical aberration? | When light passes through the edgesof the lens focusing at a slightly different place than light passing through the center of the lens. |
What is Chromatic aberration? | When different speeds of light cause different refractions for different colors. |