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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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Presentation Transcript
slide2

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?
slide3

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
slide5

Terms

    • Telescope
    • Refracting Telescope
    • Reflecting Telescope
    • Electromagnetic Spectrum
slide6

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

slide7

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

slide8

Optical telescopes

    • Used to study visible light from objects in the universe
      • Focal Point
      • Objective Lens
      • Eyepiece
slide9

Refracting Telescope

    • Uses lenses to gather & focus light
    • *Use your textbook to compare & contrast a refractor & reflector telescope. Page 559
slide10

Reflecting telescope

    • Use mirrors to gather & focus light.
      • Curved mirror
      • Flat mirror
      • Eyepiece
slide12

Reflecting Telescope

    • Optical Land Telescope
      • Example: Keck Telescope
        • 36 Hexagonal mirrors in each telescope
        • Allows more light
        • Produces a 10 m aperture
slide13

Limits of astronomical observations

    • Atmosphere
      • Water Vapor
      • Light Pollution
      • Air Pollution

These distort the images produced

slide14

How to overcome limitations

    • Dry Areas
    • Mountain Tops
      • Air is thinner
      • Less air & light pollution
slide15

Reflecting Telescope

    • Optical Telescope in Space
      • Example: Hubble Space Telescope
      • Avoids interference by the atmosphere
      • 2.4 m aperture
slide16

James Clerk Maxwell 1852

    • Proved visible light is a part of the electromagnetic spectrum (EM)
slide17

Detecting EM Radiation

    • Nonoptical Telescopes
      • Example: Radio Telescope
slide18

Nonoptical Telescopes

    • Example: Chandra X-ray Observatory
      • Placed in space to avoid limitations by Earth’s atmosphere.
      • Detect Black Holes
slide19

Quiz: Complete this formative assessment

  • Submit into your period In-Box.
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