Chapter 3 Flashcards
opaque
allowing no light to pass through
transparent
clear, allowing light to pass through
translucent
allowing light through but diffusing (scattering)it so objects cannot be seen clearly
luminous
able to produce its own light
reflection
the bouncing back of light
lens
a two-sided piece of transparent material with one or both sides curved
concave lens
a lens that is thicker at the edges than in the middle, making things look smaller
convex lens
a lens that is thicker in the middle than at the edges, making things look larger
focus
to gather together in one place
refraction
the bending of light rays as they enter a new material
prism
a transparent object that separates the colors in white light by bending them at different angles
spectrum
the series of colored bands created when sunlight is separated
infrared light
invisible light beyond the red end of the spectrum; heats the object it strikes
retina
the lining at the back of the eyeball that is sensitive to light
pupil
the opening in the iris through which light enters the eye
iris
the colored part of the eye that surrounds the pupil and regulates its size
cornea
the transparent, outer layer at the front of the eyeball
tapetum
an extra layer of cells behind the retina of many nocturnal animals
