THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from...
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Transcript of THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from...
![Page 1: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/1.jpg)
THE SUN-EARTH-MOON SYSTEM
Chapter 28
![Page 2: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/2.jpg)
•The best tool to study the universe is the light emitted from it – Radiation
•We study Electromagnetic Radiation•Electric and magnetic disturbances traveling through space as waves
•We can only see the visible light part of the spectrum
![Page 3: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/3.jpg)
Electromagnetic Spectrum
• Arranged according to wavelength and frequency
• Type of radiation is classified by its wavelength
![Page 4: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/4.jpg)
Wavelength & Frequency
Wavelength – the distance from one wave to another
Frequency – the number of waves that pass a given point in a certain amount of time
![Page 5: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/5.jpg)
c = λfc = speed of light (3 x 108 m/s or 300,000,000 m/s)λ= wavelengthf = frequency
*Remember ALL electromagnetic waves travel at the speed of light
With this equation, if you know one, you can find easily find the other.
![Page 6: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/6.jpg)
Telescopes•GOAL : To bring as much radiation as possible to a focus
•Benefits1. Modify them to observe all wavelengths2. Collects from distant objects and focuses it to
a point where it can be studied3. Allows use of other special equipment4. Used to make time exposures the human eye
may miss
![Page 7: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/7.jpg)
Visual Telescopes
Visual telescopes are used to focus visible light (also work for infrared and UV)
•Refracting•Reflecting
![Page 8: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/8.jpg)
Refracting Telescopes• 1st used, made around 1600•Uses Lenses•Objective Lens – Largest
Eye Piece Lens Second•When light passes through objective lens, it focuses the light away from the lens.• The larger the objective, the more light it can collect
![Page 9: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/9.jpg)
Refracting Telescope
![Page 10: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/10.jpg)
Reflecting telescopes•Uses mirrors• The larger the mirror, the more light collected• A flat mirror reflects the light to the eyepiece lens•Most telescopes used today
![Page 11: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/11.jpg)
Reflecting Telescopes
![Page 12: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/12.jpg)
X-Ray Telescopes
• Can’t be focused by normal mirrors because x-rays aren’t easily reflected• Arrangement of cylindrical mirrors allows x-rays to be guided to a precise focus to form an image
![Page 13: THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649e4f5503460f94b47513/html5/thumbnails/13.jpg)
Radio Telescopes• Large dish that reflects the waves to focus above the dish