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Chapter 23: Light, Astronomical Observations, and The Sun 1a. What term is used to describe the collection that includes gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and radio waves? 1b. Which color has the longest wavelength? The shortest? 1c. How does the amount of energy contained in a photon relate to its wavelength? 2a. What is spectroscopy ? 2b. What can a continuous spectrum tell astronomers about a star? 2c. What can be learned about a star (or other celestial objects) from a dark-line (absorption) spectrum? 3. In a paragraph, describe the Doppler Effect. 4a. Why is the human eye an ineffective tool for astronomical observation? 4b. Provide two reasons why the largest telescopes are built on mountaintops away from large cities. 5a. What is the major difference between reflecting and refracting telescopes? 5b. Explain the advantages of charge coupled devices (CCD) over photographic film? 6a. What are some of the advantages of radio telescopes over optical telescopes? 6b. Explain why the Moon would make a good site for an optical observatory. 7a. Why is the Sun so important to inhabitants of Earth? 7b. Why is the Sun so significant to the study of astronomy? 7c. Describe the Sun in relationship to other stars in the universe. 8a. Describe the photosphere, chromosphere, and corona. 8b. Explain what the solar wind is . 9. In a paragraph, describe the 11-year sunspot cycle. 10a. What is the source of the Sun’s energy? 10b. What “ fuel ” does the Sun consume? 10c. What happens to the matter that is consumed in the proton–proton chain reaction?
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Subject: Physics, Science

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