Chapter 5 Outline

-Telescope- Device designed to collect light from distant objects
-Refracting Telescope- Uses a lens to concentrate and focus the light
-Reflecting Telescope- Use mirrors to collect light
-Newtonian and Cassegrain Telescopes- Use secondary mirrors for more complex light levels
-Collecting Area- The are of the telescope of which absorbs the light. Proportional to  the square of the mirror's diameter
-Angular Resolution- Highest resolution through Earth's atmosphere.
-Charge Coupled Devices (CCD)- Instead of an actual image being taken, millions of pixels are arranged into the would be image
-Image Photometry- Using a spectrometer to analyze the spectrum of a certain radiation
-Active Optics- Optics used to increase the resolution of a telescope
-Adaptive Optics- Optics used on the telescope to help it see through the Earth's atmosphere
-Radio Telescopes- Much larger than usual telescopes and track radio signals rather than light. They need to be large because such little radio radiation reaches Earth
-Interferometer- Several instruments combined into one in order to find patterns in radiation
-Infrared Telescopes/Ultra Violet Telescopes- Similar to Optical Telescopes but track light that we can't see like Infrared light and Ultra Violet light
-High Energy Telescopes- These study the X-ray and gamma waves in space, which can be harmful to humans


All large telescopes are Reflecting Telescopes. They suffer from fewer optical defects so readings can be more accurate and precise. Some physical processes can produce dufferent types of electromagnetic radiation.