trivia questions for science 8 review optics quiz #2

Science 8 TriviaScience 8 TriviaReview for Optics Quiz Review for Optics Quiz

#2#2March 2009 March 2009

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

What happens to light What happens to light when is hits a when is hits a

translucent surface?translucent surface?

Scattered

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

Cardboard is an Cardboard is an example of what example of what classification of classification of

material?material?

Opaque

Wax paper is an Wax paper is an example of what example of what classification of classification of

material?material?

Translucent

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

What is the law of What is the law of reflection?reflection?

< incidence = < reflection

The imaginary line The imaginary line perpendicular to the perpendicular to the reflecting surface is reflecting surface is called the ______. called the ______.

Normal

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°

Plane is another word Plane is another word for _______for _______

Flat

In the diagram below, In the diagram below, bb represents what? represents what?

Angle of incidence

In the diagram below, In the diagram below, cc represents what? represents what?

Normal

In the diagram below, In the diagram below, ee represents what? represents what?

Reflected Ray

Draw the appropriate Draw the appropriate normal and reflected normal and reflected

ray:ray:

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

Light travels ______ in Light travels ______ in glass than in air.glass than in air.

Slower

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

Is the following diagram Is the following diagram accurate? Yes or No? accurate? Yes or No?

NO

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

Is the following mirror Is the following mirror converging or converging or

diverging? diverging?

Converging

The point where The point where converging light rays converging light rays meet is called what? meet is called what?

Focal Point

Convex

What shape is a What shape is a diverging mirror?diverging mirror?

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

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

Make-up mirrors are an Make-up mirrors are an example of what type of example of what type of

mirror? mirror?

Concave

Is the following lens Is the following lens converging or converging or

diverging?diverging?

Diverging

A convex lens is A convex lens is thickest at the _______thickest at the _______

Middle

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?

Converging

Is the following lens Is the following lens converging or converging or

diverging?diverging?

A magnifying glass is A magnifying glass is an example of what an example of what

type of lens?type of lens?

Convex

Draw the light rays Draw the light rays emerging from the emerging from the

convex lens: convex lens:

A diverging lens is A diverging lens is thickest at the ______thickest at the ______

Edges

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