WorksheetsFinal Review - Light and Optics
Total questions: 75
Worksheet time: 47mins
Which of the following best describes an incandescent light?
gives off light when phosphors absorb ultraviolet radiation
gives off light when tungsten filament is heated
uses the least amount of electricity to produce light
living organisms that give off light
Type of light source shown here
incandescent
phosphorescent
Fluorescent
bioluminescent
The energy pathway for an incandescent source is:
Visible light energy--> thermal energy
chemical energy
---> visisble light energy
thermal energy
---> visible light energy
ultraviolet light energy ---> visible light energy
A crime scene investigator uses a chemical called luminol to detect traces of blood. The chemical glows when it reacts with the iron found in blood. This is an example of which kind of artificial light source
Phosphorescence
Chemiluminescence
Bioluminescence
incandescence
Some Halloween make-up contain chemicals that glow in the dark after for several hours after they are exposed to light. These make-ups are an example of
fluorescence.
chemiluminescence.
phosphorescence.
bioluminescence.
Over the years, many scientists have contributed to our understanding of light. All the properties listed below are correct except
Light is a form of heat.
Light travels in straight lines.
Light can bend.
Light can be reflected.
When looking into a shop window on a bright sunny day you see an image that is a mixture of your image and the items on display. The principles of light involved are
reflection and absorption
refraction and absorption
refraction and transmission
reflection and transmission
This ruler looks like it is broken because of light refraction. What property of light causes refraction?
Light travels at different speeds through different materials.
Light is magically and produced by rainbow unicorns.
Light makes objects float in water.
Light is reflecting three different rulers in the water.
What property of light is best illustrated here?
light can reflect
light can refract
light is a form of energy
light travels in straight lines
This diagram shows an investigation about the property of light.
What is the conclusion about the property of light investigated?
Light travels in a straight line.
Light travels in all directions.
Light can be reflected.
Light can be refracted.
This lake's water is so calm that it looks like a huge mirror on the ground. What property of light creates this optical illusion?
Refraction
Reflection
Transparency
Opaqueness
This polar bear is happy because someone gave him a pumpkin to play with. But, this polar bear is sad because it looks like his head is no longer attached to his body. :( What property of light creates this optical illusion?
Refraction
Reflection
Transparency
Opaqueness
Use a ray diagram to determine where the tree's shadow will be.
A
B
C
D
In this sketch of a pinhole camera, label A is:
the screen
The pinhole.
The image.
the lens
In this sketch of a pinhole camera, an important piece of information has been left out. What is it?
The object.
The image.
The pinhole.
Arrows on the light rays.
The image shows a simplified diagram of a pinhole camera.
Which statement describes the image formed?
Minified upright and real
Minified, inverted and real
Magnified, upright and real
Magnified, inverted and real
the Image shows a simplified diagram of a pinhole camera. Moving the camera further away from the object will make the image
Smaller
Bigger
Blurry
Sharper
Which of the following would result in a larger shadow to be cast on the screen?
Move the screen nearer the object.
Move the object closer to the screen.
Move the light source nearer the object.
Move the light source away from the object.
What type of object is shown in the picture?
opaque
transparent
translucent
Which of the following describes a material that allows some light to pass through?
Diffuse
Opaque
Translucent
Transparent
The image shows an object that is __________.
transparent
translucent
opaque
The objects are classified according to their _________________.
thermal property
speed of light
reflection of light
degree of transparency of light
Which one of the following can A, B and C be?
A - Rubber
B - Oil
C - Mirror
A - Metal
B - Tomato sauce
C - Clear glass
A - Wood
B - Tap water
C - Frosted glass
A - Leather
B - Frosted glass
C - Tap water
Choose the law of light implied in this situation
Reflection
Refraction
Adding
Scattering
What is called the normal to the surface?
the line perpendicular to where the light ray strikes the surface
the reflecting surface itself
the angle of the incoming beam of light
the line parallel to a reflecting surface
From the diagram, what is the angle of incidence?
40 degrees
50 degrees
80 degrees
90 degrees
Which one of the arrows shows the correct direction of reflected light when the light from the torch falls on the mirror?
A
B
C
D
From the diagram shown, what is the angle of incidence?
40o
50o
80o
90o
From the diagram shown, what is the angle of reflection?
20o
40o
70o
90o
Given that the angle of incidence = 30 degrees
Which is the correct diagam?
A
B
C
D
If you were using a plane mirror to help put in an earring, which of the following statements would be true?
Your image appears larger and inverted.
Your image appears smaller and inverted vertically.
Your image is the same size and upright
Your image is the same size and inverted vertically.
Which one of the following diagrams shows the correct reflection of light at the right side mirror which enables the driver in the car to see the lorry?
What occurs to light rays after they hit a convex mirror?
They converge
They diverge
They reflect at right angles.
They are absorbed.
What type of image would you see in the concave mirror shown if you hold it very close to your eyes?
upright, smaller than the object
upright, larger than the object
upside down, larger than the object
upside down, smaller than the object
A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers?
a convex mirror
a concave mirror
plane mirror
What causes light waves to refract?
The speed of light is reduced to zero
The light hits an opaque object
The light is bounces off a shiny surface.
The speed of light changes from one medium to the next.
Light travels fastest through which of the following materials?
Diamond
Glass
Water
Air
Kimberley placed a loonie into a pail of water and noticed that when it was in the water it appeared smaller than it really was. She then reached into the pail to pick up the loonie and realized it was not in the exact spot it appeared to be. This optical illusion is created because the light rays are:
reflecting
refracting
scattering
absorbing
On the diagram, B is:
The refraction ray
The normal
The angle of incidence
The incidence ray
In the ray diagram below, which line represents the incident ray?
A
B
N
Why does the bottom of a deep swimming pool appear shallower?
Less light is available in the swimming pool
The image seen is where eyes reach it's sight limit
Reflected ray becomes closer to the normal line
Refracted ray becomes closer to the normal line
On the diagram, E is:
The angle of incidence
The normal
The angle of reflection
The angle of refraction
In the ray diagram below, which angle represents the refracted angle?
A
B
C
Based on the diagram, which is statement is correct?
P and Q are media with different densities
P and Q shares equal densities
Q is denser than P
P is denser than Q
If medium Q is more optically dense than medium P, which of the following is a possible refracted ray?
A
B
C
D
Which is a refracting object that is thicker in the center than it is at the edges?
Convex lens
Concave lens
Convex mirror
Concave mirror
Which type of lens could be used for magnifying objects?
plane
one-way
concave
convex
Which properties describe images formed by the lens in the figure?
upright, larger than the object
upright, smaller than the object
upside down, larger than the object
upside down, smaller than the object
which type of lens
concave
convex
What type of lens creates the image seen in the eyeglasses?
convex
concave
reflection
plane
The image formed by a concave lens is similar to that formed by a __________.
convex mirror
plane mirror
convex lens
concave mirror
What type of image is formed in this ray diagram?
real image where the light rays meet at a point
virtual image where the light rays meet at a point
real image where the light rays appear to originate from a point
virtual image where the light rays appear to originate from a point
Which of the following describes the formation of a real image?
can be projected onto a screen, forms where light rays converge
can be projected onto a screen, forms where light rays appear to converge
cannot be projected onto a screen, forms where light rays converge
cannot be projected onto a screen, forms where light rays appear to converge
Where does an image form on the eye?
the retina
optic nerve
cornea
the lens
What structure carries electrical signals from the retina to the brain to be interpreted?
Focal point
Cornea
lens
optic nerve
Which one of the following is true both for human eye and digital camera?
the sensor detects light.
the aperture controls the amount of light that enters.
the lens focuses the light.
What vision problem is shown in this illustration?
Astigmatism
Nearsightedness
Farsightedness
none (vision is normal)
To correct nearsightedness, which lenses should be used and why?
Concave to spread the rays out more
Concave to converge the rays more
Convex to converge the rays more
Convex to spread the rays out more
What is a common use of photocells?
alternative energy source
act as a light sensitive switch in circuits
long distance communication
precision cutting
Refracting telescopes use what optical system to form an image of a distant object?
2 concave mirrors
2 convex lenses
1 concave mirror and a convex lens
2 concave lenses
Solar panels generate electricity using photovoltaic cells that receive sunlight. To protect these cells from moisture while allowing sunlight to pass through, engineers must design a cover for the solar panel that is –
waterproof and transmits light
very flexible and reflects light
stronger than steel and bends light
cold to the touch and absorbs light
The type of image formed in the screen by the projector.
Real image
Virtual image
Type of image formed in the picture
real image
virtual image
What is the responding variable in this experiment?
distance between lens and eraser
length of eraser
type of lens in visualizer
length of image
What conclusion can you make from this experiment?
convex lens produce real images
convex lenses produce virtual images
the greater the distance between the lens and eraser, the larger the image produced
the greater the distance between the lens and eraser, the smaller the image produced
What is the manipulated variable in this investigation?
Distance between the light source and object
Size of shadow
Distance between object and screen
Conclusion:
The __________ the distance between the light source and the object, the __________ the size of shadow.
shorter, smaller
longer, bigger
longer, smaller
