Introduction to Light Light and the Electromagnetic Spectrum.
Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...
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Transcript of Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...
![Page 2: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/2.jpg)
Electromagnetic Radiation
• Light travels as an “Electromagnetic” Wave• The light you see is called Visible Light• Speed of light: 186,000 Miles/Second• Spectrum: the different colors and wavelengths
of light.
![Page 3: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/3.jpg)
Electromagnetic Spectrum(Energy Spectrum)
Infrared Ultraviolet
_____________ visible light_____________
Long waves ROY G BIV Short waves (infrared wavelengths) (Visible) ( Ultraviolet
Wavelength)
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Spectroscope• Splits light – into it’s “Colors”
• Identifies:
1. Elements that make up a Star
2. Star Temperature
Prism: triangular piece of glass that splits up
light.
![Page 5: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/5.jpg)
Types of Telescopes
• Optical: gathers visible light
• Radio: gathers invisible energy
• Optical: use lenses and mirrors
collects and focuses light.
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• Refracting Telescopes: Use lenses
![Page 7: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/7.jpg)
• Reflecting Telescopes: Use Mirrors
Curved Mirrors
Example: Hubble space telescope
The largest telescopes are Reflecting
![Page 8: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/8.jpg)
Hans Lippershey
• Invented the Telescope
![Page 9: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.](https://reader036.fdocuments.us/reader036/viewer/2022082818/56649efc5503460f94c0ed79/html5/thumbnails/9.jpg)
Galileo
• First person to use a telescope to observe objects in the night sky.
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Radio Telescopes
• Gathers invisible radio energy
Collects and focuses energy