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Worksheets8- Waves and Optics- End of Unit Test
Total questions: 8
Worksheet time: 24mins
What is light?
A type of sound wave
A small part of the EM spectrum
A form of matter
A chemical reaction
What is the speed of light in space?
150,000km/s
197,000km/s
300,000km/s
450,000km/s
What is the speed of light in glass?
150,000km/s
197,000km/s
300,000km/s
450,000km/s
What is the range of wavelengths for light waves?
200nm to 500nm
400nm to 700nm
500nm to 800nm
600nm to 900nm
What is a particle of light called?
Electron
Proton
Neutron
Photon
How big is a nanometer?
One millionth of a meter
One billionth of a meter
One thousandth of a meter
One hundredth of a meter
What happens when light is absorbed by an object?
It is reflected as a different color
It is transmitted to another side
It is transferred to the object, mainly as heat
It creates a magnified image of the object
What does it mean when light is reflected?
It is stored within the object
It bounces off the object
It passes through the object
It is absorbed and re-emitted by the object
When light is transmitted, what does it do?
It gets absorbed by the object
It reflects off the object and changes direction
It goes through the object
It causes the object to glow
What does an opaque object do to light?
Allows all light to pass through
Allows some light to pass through but not clearly
Does not allow light to pass through, absorbs or reflects it
Allows almost all light to pass through clearly
What is a characteristic of a translucent object?
You cannot see through it at all
It allows all light to pass through clearly
It allows some light to pass through but not clearly
It reflects all light
Which of the following best describes a transparent object?
It does not allow any light to pass through
It allows some light to pass through and reflects the rest
It allows almost all light to pass through, so you can see through it clearly
It absorbs all light
What is white light made up of?
Only the primary colors
Only the secondary colors
All the colors of the rainbow
Ultraviolet light only
How do we know that white light is made up of all the colors of the rainbow?
Because a filter separates the colors
Because a mirror reflects the colors differently
Because a prism splits the light into its component colors
Because a lens focuses the colors to a point
What does a blue object do with light?
Reflects all colors except blue
Absorbs blue light and reflects all others
Reflects blue light and absorbs all others
Reflects all colors of light equally
What happens to light when it hits a black object?
It is all reflected
It is all absorbed
It is partially absorbed and partially reflected
It changes color
What does a white object do with light?
Absorbs all colors of light
Reflects all colors of light
Changes the color of light
Emits its own light
What are the three primary colors of light?
Red, yellow, blue
Red, green, blue
Yellow, green, cyan
Magenta, yellow, cyan
What is created when the three primary colors of light are combined in different combinations and amounts?
A rainbow
Black light
All colors we see
Transparent light
What secondary color of light is made by combining red and blue light in equal amounts?
Yellow
Magenta
Cyan
Green
What type of reflection occurs when an object surface is smooth and you see an image?
Diffuse
Regular
Scattered
Dispersed
What happens during diffuse reflection?
Light is reflected in one direction only.
Light is focused into a single point.
Light is scattered in many directions, and no image appears.
Light is absorbed by the surface.
What is a lens?
A lens is a clear, curved transparent object used to reflect light.
A lens is a clear, flat transparent object used to bend light.
A lens is a clear, curved transparent object used to bend light.
A lens is an opaque, curved object used to block light.
What is the purpose of using lenses?
To curve light on purpose.
To straighten curved light.
To diffuse light into colors.
To absorb light completely.
What do convex lenses do to light rays?
Diverge
Absorb
Converge
Reflect
What do concave lenses do to light rays?
Converge
Reflect
Absorb
Diverge
What type of waves are electromagnetic waves?
Longitudinal waves
Transverse waves
Surface waves
Mechanical waves
Can electromagnetic waves travel through a medium?
Yes, but only through solid mediums
Yes, but only through liquid mediums
No, they require a vacuum to travel
No, they do not require a medium to travel
What is the term used to describe the highest point of a transverse wave?
Trough
Amplitude
Crest
Wavelength
What is the term used to describe the lowest point of a transverse wave?
Trough
Amplitude
Crest
Wavelength
What does the amplitude of a transverse wave measure?
The distance between two crests
The height of the crest or depth of the trough from the rest position
The distance the wave travels in one cycle
The number of crests passing a point per unit time
What direction do the molecules move in a transverse wave compared to the direction of wave travel?
In the same direction
In the opposite direction
Perpendicular to the direction of travel
Randomly
How do electromagnetic waves travel?
As vibrations in sound waves
As vibrations in electrical and magnetic fields
As a steady flow of particles
As a series of mechanical compressions
What properties do electromagnetic waves have?
Only magnetic properties
Only electrical properties
Neither electrical nor magnetic properties
Some magnetic and some electrical properties
What does an electromagnetic wave consist of?
A) Only electric fields that vibrate
B) Only magnetic fields that vibrate
C) Electric and magnetic fields which vibrate, thus making waves
D) Sound waves that create electric and magnetic effects
How can wavelength be measured?
From crest-to-crest or trough-to-trough.
From the start of a wave to the end of the same wave.
From the equilibrium position to the crest.
From the amplitude to the trough.
What is the symbol for wavelength?
W
λ (lambda)
ν (nu)
f
Colored area of the eye controlling pupil size
