Chapter 23 Review Questions 1. What term is used to describe the collection that

Question

Chapter 23 Review Questions

1. What term is used to describe the collection that includes gamma rays, x-rays, ultra violet light, visible light, infrared radiation, and radio waves?

2. What color has the longest wavelength?

3. What is spectroscopy?

7. How can astronomers determine whether a star is moving toward or away from earth?

8. True or false: a refracting telescope uses a mirror.

9. What is the advantage of a space telescope over a similar instrument on earth?

15. Why are radio telescopes much larger than optical telescopes?

18. Compare the diameter of the Sun to that of the Earth. 19. Describe the photosphere, chromosphere, and corona.

20. List the features associated with the active Sun and describe each.

22. What is the solar wind?

23. What fuel does the Sun consume?

Explanation / Answer

1. Spectrum of light.

2. Red has the longest wavelength.

3. It is a study which deals with how matter interacts with EM radiations.

8. For refraction we obviously need a lens. For reflecting telescope, mirror is used. So its FALSE.

18. Diameter of Sun / Diameter of Earth = 1,391,684 km /12742 km = 109.22

This means Diameter of Sun = 109 times more than that of Earth.

22. Solar wind : The one associated with Sun, it is coming in outer direction from the Sun's surface. Consists of charged particles like protons and electrons.

23. Hydrogen is the fuel used. It is combined and forms Helium. This two fuel the star like Sun.

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