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18 Cards in this Set

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