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18 Cards in this Set
- Front
- Back
Difference between a converging lens and a diverging lens?
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A converging lens is thicker in the middle and light rays are outward. Diverging lens is thinnest in the middle and light rays are away from center.
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Distinguish between a virtual image and a real image
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only a real image can be projected on a screen
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Do ray diagrams apply only to converging lenses, or to diverging lenses also?
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both
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What type of images are formed by converging lenses?
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real and virtual
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what types of images are formed by diverging lenses?
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virtual
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which instrument- a telescope, a compound microscope, or a camera is most similar to they human eye?
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camera
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explain the difference in the focus of a camera and how our eyes focus.
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camera changes the distance from lens to the film and our eyes focus by thickness of lens itself.
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Distinguish between farsighted and nearsighted vision.
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farsighted - cannot see up close
nearsighted- cannot see far away |
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distinguish between spherical abberration and chromatic abberation
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spherical- thin parts of lens bends lights differently then thick parts.
Chromatic- lens bends colors differently. |
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what condition must exist for a converging lens to produce a virtual image?
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must be in focal point
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what condition must exist for a diverging lens to produce a real image?
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never will happen
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the real image produced by a converging lens is inverted. our eyes have converging lenses. does this mean the images you see are upside down on your retinas?
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Yes
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Astigmatism
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a defect that results when cornea is curved more in one direction
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focal point
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point at which a beam of light parallel to the principal axis converges.
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cornea
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where light enters through the transparent covering.
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iris
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the colored part of the eye that surrounds the pupil
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pupil
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the opening in the iris through which light passes.
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retina
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extremely sensitive to light
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