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Chapter 3
light
59
Science
11/08/2008

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Term
Opaque
Definition
not letting light pass through
Term
Translucent
Definition
letting light through but scattering it so objects cannot be seen
Term
Transparent
Definition
allowing light to pass straight through
Term
Why cant light travel around corners



Definition
only goes straight
Term
What is the speed of light
Definition
186,000 miles per second
Term
what is a shadow
Definition
when light strikes and opaque objects

Term
Some transparent objects are
Definition
Clear plastic
glass
air

Term
Some translucent objects are
Definition
Clouds
frosted glass
water
waxed paper

Term
Some opaque objects are

Definition
Book
chair
milk
moon
breadboard

Term
Name 5 artifical lights
Definition
Light bulb
campfire
street lamp
head light
laser
Term
An object that purduces it own light is
Definition
luminous
Term
how does an incandeseent bulb work
Definition
a heated up wire by electricity produces light
Term
Some reflectors are
Definition
mirror
planet
cats eyes
moon
Term
[image]
Definition
Convex
Term
[image]
Definition
Concave
Term
[image]
Definition
Periscope
Term
[image]
Definition
Mirror

Term
Concave

Definition
Mirror that bulges away from the viewer
Term
Convex

Definition
A mirror that bulges toward the viewer

Term
focus
Definition
to gather in one place
Term
reflection
Definition
a bouncing back
Term
what is the difference between the light on your bike and your reflection
Definition
the reflector reflects light and the light produces it's own light
Term
why is the reflection of a light similar to bouncing a ball
Definition
if a light hits straight it goes straight back - if it hits at an angle it goes away at an angle
Term
explain how a periscope can make light turn corners
Definition
it has mirrors turning the light
Term
describe what concave and convex mirrors do to light
Definition
concave focuses light and convex scatters light
Term
the bending of light rays is
Definition
refraction
Term
a lens that is thicker in the middle than on the edges is
Definition
convex
Term
a lens that is thicker at the edges than in the middle
Definition
concave
Term
a lens that focuses light rays
Definition
convex
Term
a lens that scatters light rays is
Definition
concave
Term
who made the first telescope
Definition
Hans Lippershey
Term
who invented the reflecting telescope
Definition
sir issac newton
Term
how did Galileo improve Lippershey's telescope
Definition
he made it so you could see right side up
Term
which color in visible light has the longest wave length
Definition
red
Term
which color in visible light has the shortest wavelength
Definition
violet
Term
why does a green object look green
Definition
because it reflects green and absorbs all the other color light waves
Term
which are the warm colors
Definition
red, orange, yellow
Term
which are the cool colors
Definition
green, blue and violet
Term
band of colors in order
Definition
roy g. bv
red, orange, yellow, green, blue, violet
Term
describe the process that enables people to see
Definition
your pupils open and let light come in and then the lens reflect and the optic nerve transmits it to the brain.
Term
the kind of glasses a nearsighted person needs
Definition
concave
Term
the kind of glasses that a farsighted person needs
Definition
convex
Term
why do birds need sharp eyes
Definition
to see their food
Term
what is the purpose of an insect's simple eyes
Definition
to make them aware of simple changes in light
Term
what is the purpose of an insect's compound eyes
Definition
to see in many directions at one time
Term
what do many animals have on the back of their eyeballs to help them see at night
Definition
tapetum
Term
what causes an animal's eyes to look as though they glow in the dark
Definition
the tapetum reflects light
Term
does a deer have monocular vision or binocular vision
Definition
monocular
Term
does a horse have monocular or binocular vision
Definition
monocular
Term
what is monocular vision
Definition
when the eyes are on the side of the head and see 2 different pictures
Term
what is binocular vision
Definition
when the eyes both get one picture
Term
which part of the eye can grow larger in size to allow more light to enter
Definition
iris
Term
the retina of the eye is something like a) a mirror or b) a periscope or c) camera film?
Definition
film
Term
the transparent covering of the eyeball
Definition
cornea
Term
the bending of light
Definition
refraction
Term
the lining inside your eyeball where light is focused
Definition
retina
Term
large bundle of fibers that carries messages to the brain from the eye
Definition
optic nerve
Term
the transparent layer at the front of the eyeball
Definition
cornea
Term
what shape is the lens in your eye
Definition
convex - thicker in the middle than the edges