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. I & III
b. I & IV
c. II & III
d. II & IV
e. I
Question 2
The Almagest
a. is the book that first described the heliocentric solar system.
b. is a collection of the science and mathematics of the Greeks.
c. caused the author to be sentenced to house arrest.
d. is a book of astrological myths and predictions produced by the Arabs.
e. first described the Copernican theory.
A very high-resolution texture of the Moon, including a normal map
Gravity field of the Moon
The Moon passing in front of the Sun, from the STEREO-B spacecraft.
The Moon During the Day
The Visible Spectrum of Electromagnetic Energy