Ch 22: Overview of Telescopes

About This Chapter

There's a lot more to telescopes than the model you might have aimed out of your bedroom window as a kid. Use this detailed chapter to learn more about telescopes to support your astronomy class lessons or to prepare for an exam.

Overview of Telescopes - Chapter Summary

The lessons you'll find in this chapter focus mainly on the types of telescopes and how telescopes work. You will have the opportunity to review key terms and explore the science behind this astronomical instrument.

What are false color images? The electromagnetic spectrum? Interferometry? These are just some of the concepts you can find out more about using this chapter. Once you have completed your review, you will be able to:

  • List and explain types of telescopes
  • Detail the powers and limitations of telescopes
  • Describe how telescopes form images and detect and measure light
  • Provide details about radio telescopes
  • Define and understand the electromagnetic spectrum and false color images
  • Identify factors hindering astronomical observations on Earth

Expert instructors guide you through this material and break down terms and telescope operations to help you more easily retain this information. Each lesson is accessible at all times, from any device, and transcripts are printable so you can generate quick-reference materials if desired. Short self-assessment quizzes check your knowledge and ensure your full understanding of one topic before you move on to the next.

8 Lessons in Chapter 22: Overview of Telescopes
Test your knowledge with a 30-question chapter practice test
Types of Telescopes: Radio, Reflecting & Refracting Telescopes

1. Types of Telescopes: Radio, Reflecting & Refracting Telescopes

Learn about the different types of telescopes that astronomers use: X-ray, radio, gamma ray, reflecting and refracting. Learn what the differences are between them and what different things they show us about the universe.

Telescopes: Powers & Limitations

2. Telescopes: Powers & Limitations

This lesson will discuss some limitations and three important powers of the telescope: the light gathering power, resolving power, and magnifying power.

How Telescopes Form Images

3. How Telescopes Form Images

This lesson will explain to you the fundamental points of how images are formed in refracting and reflecting telescopes as well as why our eyes need telescopes to help us see distant objects.

How Telescopes Detect & Measure Light

4. How Telescopes Detect & Measure Light

This lesson will go over the numerous methods astronomers can use to detect and measure light, including photography, spectroscopy, photometry, and CCDs.

Radio Telescopes & Interferometry

5. Radio Telescopes & Interferometry

This lesson will go over some key concepts related to radio astronomy. We'll cover what radio telescopes are, the basics of how they function, and what their disadvantages are compared to optical telescopes and how this is resolved.

Telescopes & the Electromagnetic Spectrum

6. Telescopes & the Electromagnetic Spectrum

This lesson will teach you about which forms of light can reach the ground and which cannot and how we overcome this problem. We'll go over the concept of seeing as well as why we send telescopes into space.

Telescopes & False Color Images

7. Telescopes & False Color Images

How do we 'see' invisible forms of light if they're invisible? What would happen if your eyes had the ability for X-ray vision here on Earth? This lesson will help answer these questions.

Factors That Hinder Astronomical Observations on Earth

8. Factors That Hinder Astronomical Observations on Earth

This lesson will discuss several important factors that affect the ability of someone using a telescope to see a celestial object clearly, including weather, dust, seeing, and light pollution.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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