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Optical or Nonoptical

Optical or Nonoptical. In your science journal write a brief answer to the following questions: Have you ever bent or slowed down light? How did you do this?. In your science journal write a brief answer to the following questions: Have you ever bent or slowed down light? Wearing eyeglasses

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Optical or Nonoptical

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  1. Optical or Nonoptical

  2. In your science journal write a brief answer to the following questions: • Have you ever bent or slowed down light? • How did you do this?

  3. In your science journal write a brief answer to the following questions: • Have you ever bent or slowed down light? • Wearing eyeglasses • Looking through a microscope

  4. Compare refracting & reflecting telescopes • Explain how the atmosphere limits astronomical observations & explain how astronomers overcome limitations • List types of nonoptical telescopes Objectives

  5. Terms • Telescope • Refracting Telescope • Reflecting Telescope • Electromagnetic Spectrum

  6. What color are Saturn’s rings? What does the surface of the moon look like? How can you answer these questions?

  7. What color are Saturn’s rings? What does the surface of the moon look like? What would you use?

  8. Optical telescopes • Used to study visible light from objects in the universe • Focal Point • Objective Lens • Eyepiece

  9. Refracting Telescope • Uses lenses to gather & focus light • *Use your textbook to compare & contrast a refractor & reflector telescope. Page 559

  10. Reflecting telescope • Use mirrors to gather & focus light. • Curved mirror • Flat mirror • Eyepiece

  11. Reflecting Telescope • Optical Land Telescope • Example: Keck Telescope • 36 Hexagonal mirrors in each telescope • Allows more light • Produces a 10 m aperture

  12. Limits of astronomical observations • Atmosphere • Water Vapor • Light Pollution • Air Pollution These distort the images produced

  13. How to overcome limitations • Dry Areas • Mountain Tops • Air is thinner • Less air & light pollution

  14. Reflecting Telescope • Optical Telescope in Space • Example: Hubble Space Telescope • Avoids interference by the atmosphere • 2.4 m aperture

  15. James Clerk Maxwell 1852 • Proved visible light is a part of the electromagnetic spectrum (EM)

  16. Detecting EM Radiation • Nonoptical Telescopes • Example: Radio Telescope

  17. Nonoptical Telescopes • Example: Chandra X-ray Observatory • Placed in space to avoid limitations by Earth’s atmosphere. • Detect Black Holes

  18. Quiz: Complete this formative assessment • Submit into your period In-Box.

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