chapter 18 powerpoint chapter review questions mrs. miller 6a light
TRANSCRIPT
Chapter 18
PowerPointChapterReview
Questions
Mrs. Miller6A
light
What do you “think”when you hear
the wordopaque?
???Answer???
NO WAY!
What do “think” when you hear
the wordtranslucent?
???Answer???
SOME!
What do “think” when you hear
the wordtransparent?
???Answer???
ALL!
Name threeKinds of mirrors.
???Answer???
planeconvexconcave
What carriesthe signals
generated by therods and cones *TO* your brain?
???Answer???
your optic nerve
Describe thelight that a laser
producesin ONE word.
???Answer???
coherent
What is thereason that a
laser beam can travel through a
curled-up optical fiber?
???Answer???
because oftotal internal reflection
What color woulda red tomato
appear under ablue light?
???Answer???
The tomato wouldappear black!
Name 3 things that can
occur whenlight strikesan object.
???Answer???
The light can be:• reflected• absorbed• transmitted
Clear glass, water, and
air are examples of what kind of
material?
???Answer???
transparent
What happenswhen light passes
from air intowater?
???Answer???
The lightSlows down
What happens when white light
strikes a black object?
???Answer???
no light isreflected
What is the hole through which
light entersthe eye?
???Answer???
Thepupil
What happenswhen parallel rays
of light hit asmooth surface?
???Answer???
regularreflection
What are theprimary colors of
LIGHT?
???Answer???
RedGreenBlue
Are frosted glassand wax paper:
transparenttranslucent or opaque?
???Answer???
translucent
Describe what ishappening if a
person isnearsighted.
???Answer???
•they don’t see well far away•their eyeballs are a little too long
Nearsightedness
What do we calllong, thin strandsof glass or plasticthat carry light for
long distanceswithout allowing the light to fade.
???Answer???
Optical fibers
What do we callthe transparent
front surfaceof the eye?
???Answer???
cornea
What do we callan image of adistant object
caused by refraction of light?
???Answer???
mirage
What device useslenses to focuslight rays and
record an imageof an object on
photographic film?
???Answer???
camera
Where are therods and cones
located?
???Answer???
On the retina
What occurs when parallelrays of lighthit a rough
or bumpy surface?
???Answer???
diffusereflection
What aresubstances called
that are usedto color
other materials?
???Answer???
pigments
What instrumentis used in
holography?
???Answer???
A laser
What do any twoprimary colors of light
combined inequal amounts
produce?
???Answer???
A secondary
color
Name a difference between the
refracting telescope and the
reflecting telescope.
???Answer???
Refracting telescope - uses lenses
Reflecting telescope - uses mirrors
This is located where the optic nerve
begins, and it is part of the retina.
What is it?
???Answer???
theblind spot
What is aninstrument called thatuses a combination
of lenses toproduce enlarged
images of tiny objects?
???Answer???
Amicroscope
What is it calledwhen the surface of a mirror curvesinward, like the
inside of a bowl?
???Answer???
concavemirror
What instrumentsuses lenses or mirrors
to collect andfocus light fromdistant objects?
???Answer???
telescopes
Because the lightrays never meet,a concave lens
can produce whatkind of image?
???Answer???
only avirtual image
What are thelight-sensitive
cells of the eye?
???Answer???
Rods and cones
What kind oflenses or mirrors
can usually be used to correct
farsightedness?
???Answer???
convex lenses
A photographicslide is an
example of what?
???Answer???
Color filter
What do we callthe bending oflight rays asthey enter
a new medium?
???Answer???
refraction
What do we calla curved piece of glass
or other transparentmaterial that is used
to refract light?
???Answer???
lens
Why are lasersuseful insurgery?
???Answer???
laser incisionsusually healfaster thanscalpel cuts
What shape is a lensthat is thinner inthe center thanat the edges?
???Answer???
concave
What do we callthe colored ring of
muscle that controlsthe size of the
pupil?
???Answer???
iris
What do we callthe bending of
light rays as theyenter a newmedium?
???Answer???
refraction
What helps the lensrelax or contract
when focusing onobjects nearby
or far away?
???Answer???
Ciliary muscles
_________________is formed wherelight rays meet
at a point.
???Answer???
A real image
A mirage is causedby ____________
as light passes throughlayers of airat different
________________.
???Answer???
refraction
temperatures
What is thecolored ring ofmuscle around
the pupil?
???Answer???
iris
A ________ lens isthicker
in the centerthan at its edges.
???Answer???
convex
To focus light, muscles in the eye
change the length andthickness of the____________.
???Answer???
lens
Nearby objectsappear blurry
to a personwho is
_____________.
???Answer???
farsightedness
What part of a your eye helps you
see in dim light?
???Answer???
The rods
What part of a telescope ormicroscope
magnifies theimage?
???Answer???
The eyepiece
What do we call light waves that are
in step, or havecrests aligned
with crests?
???Answer???
coherent
When the threeprimary colors of
PIGMENTS aremixed, what is theresulting color?
???Answer???
black
When you focuson a distant object,what does the lens
in your eye do?
???Answer???
The lens becomeslonger and thinner
What part of theeye functions onlyin bright light and
responds to color?
???Answer???
The cones
What do we callthe point at which
light raysmeet?
???Answer???
The focal point
What is ahologram?
???Answer???
a three-dimensional
photograph
How are signalssent through optical fibers?
???Answer???
The lasers convertelectrical signals
into pulses of light.
As parallel rays oflight pass through
a(n)_________ lens,they are bent toward
the center ofthe lens.
???Answer???
convex
Because ofrefraction, what do
glass prisms separatewhite light into?
???Answer???
a visiblespectrum of colors
What does aMaterial’s Index of
Refraction measure?
???Answer???
It measures how much a ray of light
BENDS when it enters that material.
________________occurs when
parallel rays of lighthit a bumpy,
or uneven,surface.
???Answer???
Diffuse reflection
What sciencechapters
will we coverthe last
Nine Weeks?
???Answer???
Chapter 19Chapter 20Chapter 13Chapter 14
It is A LOT of inkbut these slidesCAN be printedas flashcards!
??DID YOU KNOW??
What is a color filter?
???Answer???
It is a transparentmaterial that allows
certain colors oflight to pass
through it andreflects or absorbs
other colors.
What is the nameof the layer
of cells lining theinside of the
eyeball?
???Answer???
retina
Why is the whiteback and tail of a skunk
appear whiteand the legs look black?
???Answer???
White – reflects all colors of light
Black – absorbs all colors of light
Explain why a pencilin a glass of water
appears bentlooking at it
from the side!
???Answer???
Because the raysthat pass throughthe lens are bent
away from thecenter of the lensand spread out!
What is theWeb address
of your sciencetext Online?
Are you alsostudying from your comparison *chart*
of plane-concave-convexthat you made in class?
???Answer???
Yes!It is VERY HELPFUL!
What do you get if you overlapall the primary colors of light?
What do you get if you overlapall the primary colors of pigment?
???Answer???
White
Black
So, how does a television showthe color black?
???Answer???
The TV switchesoff all the coloredlights in the area
of the screenthat appears black!
What colors areused in thefour-color
printing process?
???Answer???
CyanYellowMagentaBlack
Another Web sitelinked to your
textbook iswww.phschool.com
???Answer???
www.phschool.comI like their HOT LINKS
And INTERNET ACTIVITIES
The End