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chapter 30 pp #3

powerpoint questions 3

QuestionAnswer
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.
Created by: MSeise