Optical or nonoptical
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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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Optical or nonoptical

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?


Optical or nonoptical

  • 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


Objectives

  • Compare refracting & reflecting telescopes

  • Explain how the atmosphere limits astronomical observations & explain how astronomers overcome limitations

  • List types of nonoptical telescopes

Objectives


Optical or nonoptical

  • Terms

    • Telescope

    • Refracting Telescope

    • Reflecting Telescope

    • Electromagnetic Spectrum


Optical or nonoptical

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


Optical or nonoptical

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


Optical or nonoptical

  • Optical telescopes

    • Used to study visible light from objects in the universe

      • Focal Point

      • Objective Lens

      • Eyepiece


Optical or nonoptical

  • Refracting Telescope

    • Uses lenses to gather & focus light

    • *Use your textbook to compare & contrast a refractor & reflector telescope. Page 559


Optical or nonoptical

  • Reflecting telescope

    • Use mirrors to gather & focus light.

      • Curved mirror

      • Flat mirror

      • Eyepiece


Optical or nonoptical

  • Reflecting Telescope

    • Optical Land Telescope

      • Example: Keck Telescope

        • 36 Hexagonal mirrors in each telescope

        • Allows more light

        • Produces a 10 m aperture


Optical or nonoptical

  • Limits of astronomical observations

    • Atmosphere

      • Water Vapor

      • Light Pollution

      • Air Pollution

        These distort the images produced


Optical or nonoptical

  • How to overcome limitations

    • Dry Areas

    • Mountain Tops

      • Air is thinner

      • Less air & light pollution


Optical or nonoptical

  • Reflecting Telescope

    • Optical Telescope in Space

      • Example: Hubble Space Telescope

      • Avoids interference by the atmosphere

      • 2.4 m aperture


Optical or nonoptical

  • James Clerk Maxwell 1852

    • Proved visible light is a part of the electromagnetic spectrum (EM)


Optical or nonoptical

  • Detecting EM Radiation

    • Nonoptical Telescopes

      • Example: Radio Telescope


Optical or nonoptical

  • Nonoptical Telescopes

    • Example: Chandra X-ray Observatory

      • Placed in space to avoid limitations by Earth’s atmosphere.

      • Detect Black Holes


Optical or nonoptical

  • Quiz: Complete this formative assessment

  • Submit into your period In-Box.


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