Light and Optics Review

Light and Optics Review

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Topic 1

What is Light?

1-1

Understand the basics of light, including that it’s a form of energy and it does not have a mass or take up space

Multiple Choice

Which of the following is NOT true for light

• It is a form of energy

• It does not have a mass

• It is a wave

• It cannot be converted to other forms of energy

1-2

Know the different forms energy can take and be able to tell the energy conversions that are taking place in different scenarios

Multiple Choice

The energy conversion that takes place in a solar panel is

• chemical to electrical energy

• electrical to chemical energy

• solar energy to electrical energy

• electrical energy to solar energy

1-3

Know the difference between natural and artificial light sources

Multiple Select

Select ALL of the light sources that are artificial:

• A glowstick

• Sun

• LED lights

• fluorescent lights

1-4

Know the basics of how incandescent light bulbs work and how its efficiency compares to other artificial light sources.

Multiple Choice

Which of the following is true for incandescent light bulbs?

• It works by HEATING UP A FILAMENT and it is LESS efficient than other types of light bulbs

• It works by HEATING UP A FILAMENT and it is MORE efficient than other types of light bulbs

• It works by EXCITING A GAS and it is LESS efficient than other types of light bulbs

• It works by EXCITING A GAS and it is MORE efficient than other types of light bulbs

1-5

Know that chemiluminescence is light that is produced from a chemical reaction

Multiple Choice

Which of the following is an example of chemiluminescence?

• An LED light bulb

• A television screen

• A solar panel

• A firefly

1-6

Know the difference between luminous and non-luminous objects and be able to give examples of each

Multiple Select

Select all of the objects below that are luminous

• Stars

• A mirror

• Television

• A lit candle

1-6

Know the meaning of transparent, translucent and opaque and be able to identify what category a given material falls into. 

Multiple Choice

Which of the following materials is translucent?

• styrofoam

• wax paper

• syran wrap

• a mirror

1-7

Understand how shadows are made and how this fits into the ray model of light and how the size of shadows can be changed

Multiple Choice

Your shadow animals are too large, to make them smaller you can:

• Move your hand further away from the light source

• Move your hand closer to the light source

• Move the light source closer

• Move the wall further away

Topic 2

Reflection

2-1

Know what reflection is and understand the meaning of key terms that are important to reflection such as incident ray, reflected ray, normal, angle of incidence and angle of reflection

Multiple Choice

In the diagram, which letter represent the angle of reflection?

• B

• C

• D

• E

2-2

Know the law of reflection and be able to apply it to solve for the angle of incidence or reflection in a given scenario

Multiple Choice

Using the diagram, the angle of reflection would be:

• 25^o

• 65^o

• 90^o

• 115^o

2-3

Understand that concave mirrors cause light to converge which results in an enlarged image that can be erect or inverted depending on the object’s position 

Multiple Choice

Which of the following is FALSE for a concave mirror

• It enlarges the image

• The image is always upright

• It causes light rays to converge

• It is used in headlamps

2-4

Understand that a convex mirror causes light to diverge which results in a diminished erect image. 

Multiple Choice

Which of the following is NOT a use for convex mirrors?

• Shaving mirror

• Car side mirror

• Security mirror

Topic 3

Refraction

3-1

Know what refraction is and that it occurs when light travels at an angle between two mediums with different optical densities because light travels more slowly in optically dense mediums

Multiple Choice

When light moves from air to water it:

• SPEEDS UP, resulting in it bending TOWARDS the normal

• SPEEDS UP, resulting in it bending AWAY FROM the normal

• SLOWS DOWN, resulting in it bending TOWARDS the normal

• SLOWS DOWN, resulting in it bending AWAY FROM the normal

3-2

Understand the meaning of key terms that are important to refraction such as incident ray, reflected ray, normal, angle of incidence and angle of refraction

3-3&3-4

Know that when light travels from a lower to a higher density that it will bend TOWARDS the normal line as it slows down

Know that when light travels from a higher to a lower density that it will bend AWAY from the normal line as it speeds up

Multiple Choice

An underwater light in a swimming pool is viewed from the pool deck. If the angle incidence is 45^o, what would be a possible angle of refraction?

• 32^o

• 58^o

• 90^o

• 122^o

3-5

Understand the role refraction plays in mirages and “heat haze”

Multiple Choice

The heat haze seen in this diagram is due to:

• refraction as light travels through air of different densities

• refraction as light travels through air and water in the air

• reflection as light travels through air of different densities

• reflection as light travels through air and water in the air

4-1

Know that convex lenses cause light to converge. These lenses are used to correct eyes that are too short resulting in being far-sightedness (hyperopia)

Multiple Choice

The lens shown in the diagram is...

• a concave lens which will cause light to converge

• a concave lens which will cause light to diverge

• a convex lens which will cause light to converge

• a convex lens which will cause light to diverge

Multiple Choice

A patient is far-sighted, this means that:

• They CAN'T see FAR things clearly and their eyeballs are too SHORT

• They CAN'T see FAR things clearly and their eyeballs are too LONG

• They CAN'T see CLOSE things clearly and their eyeballs are too SHORT

• They CAN'T see CLOSE things clearly and their eyeballs are too LONG

4-2

Know that concave lenses cause light to diverge. These lenses are used to correct eyes that are too long resulting in being near-sightedness (myopia)

Multiple Choice

You look at a friend's glasses and find that they have concave lenses. This means that they are:

• far-sighted and have trouble seeing things that are close

• far-sighted and have trouble seeing things that are far away

• near-sighted and have trouble seeing things that are close

• near-sighted and have trouble seeing things that are far away

4-3

Know the parts of the human eye and their function including the cornea, aqueous humor, iris, pupil, lens, ciliary muscle, vitreous humor, optic nerve and retina

Multiple Choice

This part of the eye carries signal from the eye to the brain

• retina

• pupil

• cornea

• optic nerve

4-4

Understand how the eye is able to focus on objects at different distances by changing the shape of the lens and that this is called accommodation.

Multiple Choice

The lens of the eye changes shape to see objects at different depth, this is called:

• reflection

• myopia

• diffraction

• accommodation

4-5

Be able to compare the human eye to a camera and to be able to relate parts of the eye to parts in a camera

Multiple Choice

The iris of the eye is most like this part in a camera:

• diaghragm

• digital sensor

• lens

• shutter

5-1

I can explain the basic principles and components in reflecting and refracting telescopes and that they serve to magnify objects far away

Multiple Choice

Which of the following is true for a refracting telescope

• It uses a convex lens

• it uses a concave lens

• it uses a convex mirror

• it uses a concave mirror

5-2

I can explain the basic principles and components in binoculars and that it contains reflecting prisms to allow for shorter magnifying tubes

Multiple Choice

Binoculars contain several prisms to:

• REFLECT the light so the binoculars can be SHORTER

• REFLECT the light so binoculars can be LONGER

• REFRACT the light so the binoculars can be SHORTER

• REFRACT the light so binoculars can be LONGER

5-3

I can explain the basic principles and components in a compound microscope

Multiple Choice

This part of a microscope contains a convex lens that is ALWAYS used at any magnification

• ocular lens

• objective lens

• iris lens

• fine focus lens