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chapter 19 sec 1&4
Question | Answer |
---|---|
pigment | colored substances that are used to color other materials |
secondary colors | two primary colors combine in equal amounts |
transparent | transmits most of the light that strikes it |
iris | a ring of muscle that contracts and expands to change the size of the pupil |
cones | cells that respond to color |
nearsighted | person can see nearby objects clearly, but distant objects are blurred |
optic nerve | rods and cones signals to the brain along a short, thick nerve |
complementary | primary color and a secondary color that can combine to form white light |
cornea | light enters through the transparent front surface |
opaque | reflects or absorbs all of the light it strikes |
farsighted | person can see distant objects but nearby objects are blurred |
pupil | light passes through an opening in the eye |
primary | three colors that combine to make any other color |
translucent | scatters light as it passes through |
retina | a layer of cells that lines the inside of the eyeball |
rods | are cells that contain a pigment that responds to small amounts of light |