5.02 Seeing Flashcards
property of light determined by the amplitude of the wave—how high or how low the wave actually is
brightness
property of light determined by the length of the wave
color or hue
long wavelengths are found at the __ end of the spectrum, shorter wavelengths are found at the __ end
red, blue
property of light determined by the purity of the color people see
saturation
the range of wavelengths that people can see; a small part of the electromagnetic spectrum
visible spectrum
clear membrane that covers the surface of the eye; focuses most light entering the eye
cornea
clear, watery fluid that is continually replenished; supplies nourishment to the eye
aqueous humor
hole through which light from the visual image enters the interior of the eye
pupil
round structure attached to muscles; the colored part of the eye in which the pupil is located; can change the size of the pupil, letting more or less light into the eye
iris
finishes the focusing process begun by the cornea
lens
the change in the thickness of the lens as the eye focuses on objects that are far away or close
visual accommodation
jelly-like fluid that also nourishes the eye and gives it shape
vitreous humor
condition when the shape of the eye causes the focal point to fall short of the retina
nearsightedness / myopia
condition when the focus point is behind the retina
farsightedeness / hyperopia
layer of photoreceptors and other cells; final stop for light in the eye
retina