Exam 2 Review Solutions

# Exam 2 Review Solutions - Exam 2 Review Solutions Spring...

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Exam 2 Review Solutions Spring 2008 Chapter 5 T 1. Light can behave as a particle or as a wave. T 2. The amount of energy a photon carries depends on its wavelength. F 3. Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration. Chapter 6 1. The diagram to the right illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an continuous spectrum? * a. 1 b. 2 c. 3 d. 2 and 3 e. none of them 2. At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K? * a. 50 nm b. 500 nm c. 300 nm d. 1.8×10 11 nm e. 180 nm Chapter 7 1. The diagram at the right shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. What is the temperature of the sun at a Gas Cloud 1 2 3 10,000 1,000,000 100,000 2000 3000 Temperature (K) 1000 4000 Distance (km)

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distance of 2,000 km? a. 500 K b. 900 K c. 5,000 K * d. 9,000 K e. 100,000 K 2. As the moon covers the solar disk during a solar eclipse, a flash spectrum of the sun's chromosphere can be recorded. This flash spectrum reveals an emission spectrum and provides information on the properties of the chromosphere. As the moon moves from the inner chromosphere to the outer chromosphere, the spectral lines present in the flash spectrum change. What is going on in the chromosphere that produces the changes in the flash spectrum? I. The temperature of the chromosphere decreases as the distance from the photosphere increases. II. The temperature of the chromosphere increases as the distance from the photosphere increases. III. The density of the chromosphere decreases as the distance from the photosphere increases. IV. The density of the chromosphere increases as the distance from the photosphere increases. a. b. * c. d. e. I Chapter 8 Review questions: 2. The primary benefit of a telescope orbiting Earth, such as the Hipparcos satellite, is the improvement in the resolution of the images. The resolution is much better in space because the atmosphere doesn’t smear the images out as the light passes through it. Therefore, the position of the stellar images can be determined more precisely. 3.
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Exam 2 Review Solutions - Exam 2 Review Solutions Spring...

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