WorksheetsWaves Review
Total questions: 53
Worksheet time: 1hrs 3mins
Which portion of the visible light spectrum has the lowest frequency?
red light (620 - 700 nm)
orange light (585 - 620 nm)
yellow light (570-780 nm)
green light (495-570 nm)
Which of the following can also be written as 5.4 x 10-7 m?
54 nm (54 x 10-9 m)
540 nm (540 x 10-9 m)
5.4 nm (5.4 x 10-9 m)
None of the above
How are electromagnetic waves produced?
charges moving at constant speed
stationary charges
accelerating charges
all of the above
Which of the following colors of visible light has the higher frequency: orange light or green light?
orange light
green light
Which of the following is true about electromagnetic waves?
They travel at the speed of light in a vacuum
The amount of energy they carry is directly proportional to their frequency
It has a continuous spectrum of different frequencies, which also determines the type of light
All of the above
Which of these is an example the Doppler Effect?
A change in the apparent frequency of a sound due to the source's motion relative to you.
A change in the apparent intensity of light due to the source's motion relative to you.
A change in the apparent speed of light due to the source's motion relative to you.
All of the above.
A single photon of which form of electromagnetic radiation has the lowest frequency?
gamma rays
x-rays
visible light
radio waves
What is the main difference between sound waves and electromagnetic waves?
Sound waves are transverse, while electromagnetic waves are longitudinal
Sound waves cannot travel through solids, while electromagnetic waves can.
Sound waves need a medium to travel through, while electromagnetic waves can travel through a vacuum.
All of the above
What's the relationship between a photon's energy and frequency?
They are indirectly proportional E = h/f
They are directly proportional E = hf
They follow an inverse square law E = h/f2
None of the above
What is the difference in which a microwave oven heats your food to say, heating up your food under a food warmer (infrared light)?
microwaves are absorbed by the water inside your food, causing friction, heating it up from the inside out. Infrared light is absorbed at the surface of the food, heating it up from the outside in.
microwaves carry more energy than infrared light, so it heats up your food more quickly.
microwaves have a shorter wavelength, and thus heat up your food faster than infrared.
microwaves are ionizing radiation, while infrared light is non-ionizing.
Which of the following is NOT an advantage of fiber optic cables over copper cables for transmitting data?
Fiber optic cables are much less susceptible to electromagnetic interference.
Fiber optic cables can transmit data further distances.
Fiber optic cables are much cheaper to produce.
Fiber optic cables have more bandwidth, or amount of data transmitted per unit time.
Light diffracts, or bends around, objects when passing through openings. Which model best explains this type of light behavior?
wave model of light
particle model of light
Because energy is quantized, and light carries energy, light can also be thought of as quanta (particles). What is a particle of light called?
electron
photon
alpha particle
beta particle
The longer the wavelength of light, the larger the angle at which it will diffract around an object. Which of the following is the best explanation as to why we use radio waves for communication?
radio waves move faster than visible light
radio waves have a higher frequency than visible light
radio waves have a longer wavelength than visible light
none of the above
If a wave is incident to a boundary between two surfaces at an angle, and that wave transmits into the other surface, this type of wave phenomenon occurs.
Diffraction
Reflection
Absorption
Refraction
Which form of electromagnetic radiation has the longest wavelength?
gamma rays
radio waves
infrared light
x-rays
Why is sample rate important in digital media?
The sample rate determines the intensity or volume of the wave being transmitted.
The higher the sample rate, the less information has to be stored.
The higher the sample rate, the more true the digitized waveform is to the original waveform.
None of the above.
What property of sound waves do we interpret as the volume, or intensity, of the sound?
Its frequency
Its amplitude
Its wavelength
Its wave speed
In order to tune their instrument, a skilled guitarist can use fluctuations in volume called "beat notes" to tell if their two strings are in tune with each other or not. If the two frequencies do not match, the guitarist will hear the beat notes. What wave interaction best describes what's happening here?
Wave Interference
Scattering
Transmission
Reflection
True or False: Visible light can sometimes be ionizing, depending on what color you are talking about.
True
False
What are advantages of digital music (CDs, MP3s, etc.) over analog music (vinyl, cassette)?
Analog media wears out over time, because it has to physically interact with the playback device in order for it to read the waveform (like the needle on a record player).
The sound quality of digital music is better.
Digital media can hold more data per unit of physical storage space.
Digital music can be copied without loss of the original waveform.
What is the primary reason why ultraviolet light is more harmful to human skin than visible light?
Ultraviolet light is less intense than visible light.
Ultraviolet light is absorbed by the atmosphere more than visible light.
Ultraviolet light has a higher frequency and energy than visible light.
Ultraviolet light has a longer wavelength than visible light.
Which of the following phenomena is responsible for the blue color of the sky?
Reflection of sunlight
Scattering of sunlight by air molecules
Refraction of sunlight through the atmosphere
Absorption of sunlight by water vapor
What happens to the speed of light as it passes from air into water?
It decreases
It becomes zero
It increases
It remains the same
The intensity of a sound is directly related to the amount of energy the sound wave possesses. This, in turn, is directly related to the loudness of the sound. So, a sound wave with a large intensity always has a large _______.
amplitude
frequency
all of these
wavelengeh
Because of the Doppler effect, sound _______ as the source moves toward an observer and _______ as the source moves away.
decreases in pitch (wavelengths lengthen); increases in pitch (wavelengths shorten)
decreases in pitch (wavelengths shorten); increases in pitch (wavelengths lengthen)
increases in pitch (wavelengths shorten); decreases in pitch (wavelengths lengthen)
increases in pitch (wavelengths lengthen); decreases in pitch (wavelengths shorten)
air
carbon dioxide
steel
glass
Refraction is the bending of a wave as it passes at an angle from one medium to another. The wave bends because the speed of the wave changes between the first and the second medium. Which of the following diagrams correctly represents the refraction of a wave that moves faster in medium b than it does in medium a?
Hanson yells across a ravine toward his cousin, who is on the other side. Sound waves from his mouth travel outward in all directions. Which of the following might cause the speed of the sound wave he generates to change?
if it is made at a high frequency
if it travels at a low frequency
if it passes from the air into water
if it moves through the air only
What is the wavelength of a wave that has a velocity of 50 m/s and a frequency of 100 Hz?
0.5 m
20 m
10 m
5 m
What happens when a wave hits an object (like a mirror) and bounces off of it?
Transmission
Absorption
Refraction
Reflection
What happens when a wave bends due to hitting an object?
Refraction
Absorption
Transmission
Diffraction
Which type of electromagnetic waves have the longest wavelength and are least dangerous to humans?
Gamma rays
X-rays
Visible Light
Radio waves
On this EM spectrum, which way should you move to INCREASE the wave energy?
to the left
to the right
On this EM spectrum, which way should you move to INCREASE the frequency?
to the left
to the right
The 0's and 1's are known as
binary.
computer talk.
code.
the matrix.
Computers store data using...
on and off switches.
0's and 1's.
hard drives.
All of the above.
What are Fiber Optics?
Thin, flexible fibers of glass
Flexible fibers of glass
Thin fibers of glass
Those glow toys
For what are Fiber Optics mainly used?
Long distance communication
Imaging
Phones
Downloading Apps
How do Fiber Optics work?
By connecting and transferring energy
By remitting and subtracting power from other fiber optics
By using light pulses to transfer data
By converting sound waves in to binary code
How does light travel through the cable?
Refraction and Reflection
Refraction only
Dispersion
Total Internal Reflection
What is one benefit of Analog Data Storage?
Analog signals become distorted over long distances
Analog systems preserve waves forms
Analog devices for playback wear out
Analog systems are less expensive
Find the false statement.
Digital systems sample the wave form
Digital files are distorted over long distances
Digital media is less expensive to produce than analog media
Digital systems convert waves into a binary code
Which statement is true?
Digital files of binary code are easy to transmit
Analog systems convert wave information into a binary code
Digital recordings sound more like the original
Analog signals do not distort over long distances
The person tapping in a signal to send through Morse code is doing what to the message?
encoding it
transmiting it
decoding it
storing it
Why are fiberoptic cables preferred over copper wire in telephone and Internet applications?
used both indoors and outdoors
easier to manufacture and install into office buildings
more flexible and needs no power source
less sensitive to temperature/electromagnetic interference
Which describes an advantage of total internal reflection within an optical fiber?
It converts electrical signals into optical signals
allows optical signals to be transmitted along a curved path
It converts optical signals into electrical signals
It allows electrical signals to be transmitted along a curve
What has replaced much of the copper circuitry that connected telephone switching stations?
microelectronics
tungsten wire
fiber optic cable
reinforced plastic
What is the primary function of a prism in optics?
To magnify objects
To reflect light
To absorb light
To disperse light into its component colors
Which of the following is a characteristic of digital signals?
They are continuous
They are discrete
They have infinite resolution
They cannot be compressed
What happens to the wavelength of a wave as its frequency increases?
It increases
It becomes zero
It decreases
It remains the same
What is the photoelectric effect?
The emission of electrons when light shines on a material
The reflection of light from a surface
The absorption of light by a material
The bending of light as it passes through a prism
Who first explained the photoelectric effect using the concept of quantized light?
James Clerk Maxwell
Niels Bohr
Albert Einstein
Isaac Newton
