EM Spectrum Organizer
Mrs. B-Z
The Electromagnetic Spectrum
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
Define electromagnetic radiation in classical terms
Define electromagnetic radiation in modern quantum terms
Describe the movement of electric charges at low frequencies
Describe the movement of electric charges at high frequencies
Who was the originator of the classical electromagnetic radiation theory?
List two other scientists who were involved in the understanding of electromagnetic spectrum.
Construct a picture or diagram that illustrates ALL parts of the EM spectrum (ex. TV for radio waves, Microwave oven for microwaves, etc. ) Be sure to include one picture for each region.
The Electromagnetic Spectrum
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General Info on Light
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
What is light a form of?
Why is light important to the origins of Earth?
What does most of sunlight become?
What region of light can humans see?
What region of light can pit vipers see?
What is electromagnetic radiation?
What does luminous mean?
How do we measure light?
What does opaque mean?
What is the difference between transparent and translucent?
What did Michelson and Morley do?
Is light a wave or particle?
Explain the experiments of Thomas Young.
What did Maxwell discover?
Explain the work of Planck.
General Info on Light
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X-Rays
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
Who discovered X-Rays?
What material was used to stop the X-rays and prove they were in fact real?
How are X-rays made?
What are X-rays?
What is the frequency?
What is the wavelength?
Besides seeing bones, list other ways that x-rays are used?
How many scientists have won Nobel Prizes for using X-rays in some new way?
List one discovery made by a Nobel Laureate using X-rays that you think is most important and explain what we would NOT know today if this had not been discovered.
EXPERIMENT / 1. Look at the X-ray of a dog
2. What part of the body is being X-rayed?
3. Make observations
4. How does the energy of x-rays produce the image that you see?
5. Compare the wavelength of x-rays to the other regions of the electromagnetic (EM) spectrum
X-Rays
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Ultraviolet
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
What does UV stand for?
What is the range of UV?
UV is further divided into three subcategories what are they and their ranges?
What are the biological effects of UV?
What does “germicidal” mean?
What are the biological uses of UV?
What is fluorescence?
How is UV used in fluorescence?
List the sources of UV
What are the artificial sources of UV?
List the detectors of UV
EXPERIMENT / 1. Place five drops of the NaCl and five drops of the AgNO3 into the same well in the well plate. Notice the color.
2. Does the color change indicate a chemical or physical change?
Step 3 / Write your name in light pencil on the backside of one of the filter papers
Step 4 / Now take this new solution and pour it on one of the filter papers.
Step 5 / Place the filter paper on the windowsill.
Step 6 / Come back to the filter paper at the end of the period and write any color changes you have observed.
7. How does this show the effects of a wave (the UV light) on matter?
Ultraviolet
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Visible Light
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
Which portion of the EM spectrum is most familiar? Why?
s this a broad or narrow area of the EM spectrum?
What are the wavelengths?
What is the energy of a photon in the visible region?
How does this compare with the radio wave region?
Why could life not exist with this region of the EM spectrum?
What does solar energy convert?
Why is solar energy considered to be a good source of power?
What is the difference between photothermal and photovoltaic devices?
How is light guided and transmitted?
List some devices that use optical fibers.
Visible Light
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Infrared
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
What is the range of wavelengths?
When was this area of the EM spectrum discovered and by whom?
List some elements that can be used for infrared materials?
How does meteorology use infrared technology?
Describe how infrared technology is used in the medical field.
How do infrared imagers use work? How are they used?
What is infrared spectroscopy? How is it used?
How is infrared technology used by the military?
How is infrared technology used by the space program?
EXPERIMENT: / 1. Observe the thermometers on the side of the cabinet (near the window).
2. One is on white and the other is on black background. Is there a temperature change?
3. Why would you expect there to be a temperature change between the colors?
4. How does this show that waves are a form of matter that interacts with matter?
Infrared
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Microwaves
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
What is the range of wavelengths?
What is the range of frequencies?
Name some materials used for transmission?
How are microwaves generated?
How does radar use microwaves?
How do electronic countermeasures use microwaves?
How are microwaves used in communications?
How is radiometry used with microwaves?
How do microwaves produce physiological effects?
How do physics and chemistry use microwaves?
How are microwaves used in food production?
How are microwaves used in industrial heating and drying?
EXPERIMENT: / 1. Carefully touch the outside of the red and blue beakers. What do you observe about their temperature? If they feel about the same temperature, put the beaker with red liquid in the microwave for no more than 20 seconds and carefully remove the liquid. You should feel that the liquid is hotter than the blue liquid.
2. How does this show that waves are a form of energy that interacts with matter?
3. What is different in how this type of wave interacts with matter compared to the x ray’s interaction with matter?
Microwaves
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Radio Waves
Directions: Read the packet of information and answer the questions below. Be sure to cite where you got the information on the bibliography (last page) of this document.
Question / Answers—be specific and thoroughUse complete sentences whenever possible.
What is the frequency of radio waves?
What is frequency management?
What is harmful interference?
How can harmful interference be avoided?
Radio waves can cross geographic boundaries of a country explain why this could be a benefit and a problem?
What is the range of wavelength of a radio wave?
What are the AM band frequencies?
What are the FM band frequencies?
What are the VHF TV frequencies?
What are the UHF TV frequencies?
What are the frequencies for channels higher than 70?
The frequencies upper & lower 700 MHz are used for what?
Why can these frequencies not be fully used?
What is Wi-Fi and how does it relate to radio waves?
What is Bluetooth and how does it relate to radio waves?
What is WiMax and how does it relate to radio waves?
What is amateur radio and how is/was it used?
Radio Waves
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EM Spectrum Organizer
Mrs. B-Z
Bibliography
Directions: On each article you read there is a citation (author, publisher, website address, etc.) of that website. Record each document here for each station.
Station / Citation (usually on last page of packet) / Teacher’s initialsRadio
waves
Microwaves
Infrared
Radiation
Visible
Light
Ultraviolet
radiation
X-Ray & Gamma
rays
Light
EM Spectrum
Do NOT cut this page!
Bibliography
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EM Spectrum Organizer
Mrs. B-Z
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