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?
A) I & III
B) I & IV
C) II & III
D) II & IV
E) I

Question

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? 
A) I & III 
B) I & IV 
C) II & III 
D) II & IV 
E) I

Quizplus · Accepted Answer

The changes in the flash spectrum are due to the change in temperature and density of the chromosphere as the moon moves from the inner to the outer chromosphere. The inner chromosphere is hotter and denser than the outer chromosphere, and this affects the wavelengths of the spectral lines seen in the emission spectrum. Therefore, the changes observed in the flash spectrum are a result of the changing temperature and density of the chromosphere, which is described by II and III.

As the Moon Covers the Solar Disk During a Solar