Ch. 28 Sec. 1 - PowerPoint PPT Presentation

About This Presentation
Title:

Ch. 28 Sec. 1

Description:

Ch. 28 Sec. 1 Tools of Astronomy Tools Radiation Light is the best tool used to observe and learn about the universe Before telescopes, scientist used light from ... – PowerPoint PPT presentation

Number of Views:34
Avg rating:3.0/5.0
Slides: 12
Provided by: BA46
Category:
Tags: moon | sec

less

Transcript and Presenter's Notes

Title: Ch. 28 Sec. 1


1
Ch. 28 Sec. 1
  • Tools of Astronomy

2
Tools
  • Radiation
  • Light is the best tool used to observe and learn
    about the universe
  • Before telescopes, scientist used light from
    stars
  • Travel as waves
  • Radio waves, Infrared, Visible light, UV rays
  • Humans only see visible light
  • Classified by frequencies
  • As frequencies increase, the wavelength decreases

3
(No Transcript)
4
Tools
  • Telescope
  • First used by Galileo
  • 4 Main Benefits
  • 1) Different Attachments
  • Observe all wavelengths that objects emit
  • 2) Light to a Focus
  • Takes distance light and brings it to one point
    for human eye to see

5
Telescope
  • 3) Use of specialized equipment
  • Photometer used to measure intensity
  • Heat and strength of stars, Novas
  • 4) Time Exposures
  • Selected time intervals can gather photographs
    to faint to be seen from human eye

6
Telescope
  • Refracting
  • Used a lens to bring a light into focus
  • Faint ring around image is distortion of light

7
Telescope
  • Reflecting
  • Bring light into focus using mirriors
  • Most scientific telescopes are located high
    altitude for less atmosphere

8
Radio Telescope of different Wavelengths
  • Bring in as much radiation into focus
  • Dish that reflects all waves to a focus above the
    dish

9
Radio Telescope of different Wavelengths
  • Interferometry
  • Process of linking separate telescopes together

10
Others
  • Space instruments are used because Earths
    atmosphere blocks many different rays
  • Hubble Space Telescope
  • Use til 2010
  • Picks up sharp images

11
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com