Mirrors, Lenses, and the Eye
the wavelengths of light waves _____________ and reflected depend on the materials from which the object is made
absorbed
when light wages of different wavelengths interact with an object, the object ________________ some light waves and reflects others.
absorbs
if an object is ____________ than one focal length from a concave mirror, the image of that object will be right-side up
closer
the image formed by a concave lens appears to be upright, smaller, and _____________ to the lens than the original object
closer
a _______________ _______________ is curved inward on one side
concave lens
a _________________ _______________ has a reflecting surface that curves inward.
concave mirror
____________ ____________ fire when light levels are high
cone cells
in dim light, the iris _________________ and the pupil becomes larger
contracts
a _____________ _______________ has a reflecting surface that curves outward
convex
a _____________ ______________ curves outward on one side
convex lens
a cornea is a ________________ _____________ made out of transparent tissue
convex lens
the __________________ is the first part of your eye that light rays travel through
cornea
when a surface is not smooth, the reflected light rays travel in many different directions; this is called _____________ reflections
diffuse
when an object is less than one ______________ __________________ from a convex lens.
focal length
like a concave lens, a convex lens has a ____________ ___________ and a focal length
focal point
the ___________ controls the amount of light entering the eye
iris
the mirror is right-side up and ____________________
left-side down
a transparent object with at least one curved side that causes light to change direction is called a ___________
lens
behind your iris is the ______________ which is transparent tissue that helps you focus on an object
lens
any reflecting surface is a _____________
mirror
if the object is ______________ than one focal length from a concave mirror, the image will be upside down
more
the ________________ is an opening that leads into the inside of your eye
pupil
a smooth surface reflects light rays traveling in the same direction at the same angle; this is called ____________ reflection
regular
In bright light, the iris ________________ and the pupil becomes smaller
relaxes
the back of the eye has a layer of light-sensitive cells called the _______________ ; images form on this layer
retina
from a convex lens, the image appears _______________ __________
right-side up
images in a convex mirror are always _________________ ___________ and smaller than the original object
right-side up
__________ _____________ in the retina fire when the levels of light are low
rod cells
the __________ of a mirror's surface affects how the image appears in that mirror
shape
when reflected light comes in contact with your eye, the cone cells in your retina send ________________ to your brain
signals
parallel light rays reflect through one _____________ ____________
vocal point
the color than an object appears to be dependent, in part, on the ______________________ of the light shining on it.
wavelengths
the colors of an object depend on the _______________________ of the light rays it reflects
wavelengths
three types of cone cells are sensitive to different _______________________________ of light, allowing us to see colors
wavelengths
_____________ light is a combination of light of many different colors
white
