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Science 8 TriviaScience 8 TriviaReview for Optics Quiz Review for Optics Quiz
#2#2March 2009 March 2009
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According to the ray According to the ray model of light, how does model of light, how does
light behavelight behave??
Travels in a straight line
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What happens to light What happens to light when is hits a when is hits a
translucent surface?translucent surface?
Scattered
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The type of material The type of material that lets light pass that lets light pass
through unobscured is through unobscured is referred to as _________?referred to as _________?
Transparent
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Cardboard is an Cardboard is an example of what example of what classification of classification of
material?material?
Opaque
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Wax paper is an Wax paper is an example of what example of what classification of classification of
material?material?
Translucent
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When a single light source When a single light source casts shadows of two casts shadows of two
objects, the object with objects, the object with the larger shadow is ______ the larger shadow is ______
the light sourcethe light source
Closer to
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What is the law of What is the law of reflection?reflection?
< incidence = < reflection
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The imaginary line The imaginary line perpendicular to the perpendicular to the reflecting surface is reflecting surface is called the ______. called the ______.
Normal
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According to the law of According to the law of reflection, light rays that reflection, light rays that hit a mirror at an angle of hit a mirror at an angle of
incidence of 35incidence of 35° must ° must reflect off at what angle?reflect off at what angle?
35°
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Plane is another word Plane is another word for _______for _______
Flat
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In the diagram below, In the diagram below, bb represents what? represents what?
Angle of incidence
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In the diagram below, In the diagram below, cc represents what? represents what?
Normal
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In the diagram below, In the diagram below, ee represents what? represents what?
Reflected Ray
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Draw the appropriate Draw the appropriate normal and reflected normal and reflected
ray:ray:
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Refraction is caused by Refraction is caused by light changing _____ as it light changing _____ as it
moves from one moves from one medium to another medium to another
Speed
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Light travels ______ in Light travels ______ in glass than in air.glass than in air.
Slower
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When a light ray passes When a light ray passes from a more dense to from a more dense to less dense medium, it less dense medium, it will bend _______ the will bend _______ the
normal. normal.
Away From
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Is the following diagram Is the following diagram accurate? Yes or No? accurate? Yes or No?
NO
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When light rays pass from air into When light rays pass from air into glass, they bend _____the normal glass, they bend _____the normal as they move into a material with as they move into a material with
a ______ densitya ______ density a) toward the normal; greater densitya) toward the normal; greater density
b) away from the normal; greater b) away from the normal; greater densitydensity
c) toward the normal; lower densityc) toward the normal; lower density d) away from the normal; lower d) away from the normal; lower
densitydensity
a) toward, greater
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Is the following mirror Is the following mirror converging or converging or
diverging? diverging?
Converging
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The point where The point where converging light rays converging light rays meet is called what? meet is called what?
Focal Point
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Convex
What shape is a What shape is a diverging mirror?diverging mirror?
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The image seen in a The image seen in a distant (far away) distant (far away)
concave mirror appears concave mirror appears to be _______. to be _______.
Smaller & Upside down
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What type of mirrors are What type of mirrors are used in side view used in side view
mirrors of vehicles? mirrors of vehicles?
Convex
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Make-up mirrors are an Make-up mirrors are an example of what type of example of what type of
mirror? mirror?
Concave
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Is the following lens Is the following lens converging or converging or
diverging?diverging?
Diverging
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A convex lens is A convex lens is thickest at the _______thickest at the _______
Middle
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Draw what would Draw what would happen to the light rays happen to the light rays
as they pass through as they pass through the double concave the double concave
lens? lens?
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Converging
Is the following lens Is the following lens converging or converging or
diverging?diverging?
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A magnifying glass is A magnifying glass is an example of what an example of what
type of lens?type of lens?
Convex
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Draw the light rays Draw the light rays emerging from the emerging from the
convex lens: convex lens:
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A diverging lens is A diverging lens is thickest at the ______thickest at the ______
Edges
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A clear image can only A clear image can only be projected onto a be projected onto a screen using a _____ screen using a _____
lenslens
Convex