Topic: Electromagnetic Spectrum
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Transcript of Topic: Electromagnetic Spectrum
Topic: Electromagnetic Spectrum
Essential Question: How do astronomers use the electromagnetic spectrum to study the
universe?
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Electromagnetic SpectrumThe range of radiant (light) energy arranged in order of wavelength and frequency
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Wavelength–The distance between two
crests of a waveFrequency
– A count of the number of crests that pass a point in a given amount of time
– High frequency = high energy
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Radio Waves– Astronomers use them to study what
stars are made of, their structure and movement
Microwaves– Used to cook your food– Used to learn about galaxies– Used to learn about stars that are
behind clouds of dust
Radio Waves used to look at the Sun
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Infrared Waves– Used by astronomers to map dust
between starsVisible Light
– Rainbows show the different wavelengths of light
– We are able to see colors of stars which gives us a clue about their temperature
– Helps us understand the Red Shift and Blue Shift
Infrared
Visible Light
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Ultraviolet Rays– Used to learn about the structure
and how galaxies change
X-Ray Wave– Used to detect black holes because
black holes give off X-Ray waves
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Gamma Rays– Given off from any explosion like a
supernova or a black hole– Astronomers use them to gain
knowledge of how our universe began and how fast it is expanding
Now take some time…
• Take 2 minutes to go over your notes and highlight or underline the main ideas that answer the essential question, you should not highlight everything:
• Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Time to use the left hand column
• You will now write your own questions using the verbs provided.
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Electromagnetic SpectrumThe range of radiant (light) energy arranged in order of wavelength and frequency
Choose one verb to write your question:
DefineDescribeExplain
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Wavelength–The distance between two
crests of a waveFrequency
– A count of the number of crests that pass a point in a given amount of time
– High frequency = high energy
Choose one verb to write your question:
DefineDescribeExplain
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Radio Waves– Astronomers use them to study what
stars are made of, their structure and movement
Microwaves– Used to cook your food– Used to learn about galaxies– Used to learn about stars that are
behind clouds of dust
Choose one verb to write your question:
DefineDescribeExplain
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Infrared Waves– Used by astronomers to map dust
between starsVisible Light
– Rainbows show the different wavelengths of light
– We are able to see colors of stars which gives us a clue about their temperature
– Helps us understand the Red Shift and Blue Shift
Choose one verb to write your question:
DefineDescribeExplain
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Ultraviolet Rays– Used to learn about the structure
and how galaxies change
X-Ray Wave– Used to detect black holes because
black holes give off X-Ray waves
Choose one verb to write your question:
DefineDescribeExplain
Topic: Electromagnetic SpectrumEssential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Gamma Rays– Given off from any explosion like a
supernova or a black hole– Astronomers use them to gain
knowledge of how our universe began and how fast it is expanding
Choose one verb to write your question:
DefineDescribeExplain
Now let’s write a summary
Look at each question you wrote on your own, and answer each question in a complete sentence.