Exam 5: Sun Light and Sun Atoms

The Hg line has a wavelength of 434.0 nm when observed in the laboratory.If the Hg line appears in a the spectrum of a star moving away from you,at what wavelength will you observe the line?

What is believed to result from energy that has been stored in a twist in the solar magnetic field above a sunspot suddenly being released?

Why do sunspots appear dark?

-A plot of the continuous spectra of four different stars is shown in the figure.Based on these spectra,which of the stars is the hottest?

Solar flares have no known effect on the Earth.

What is the term for areas where the magnetic field does NOT loop back into the Sun?

What does helioseismology measure?

What is found in the centres of granules?

-The diagram 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 height of 2,000 km?

Describe two methods that can be used to determine the temperature of a star.

Describe two ways in which an atom can be excited.

A recent sunspot maximum occurred in 2001.What is the year of the sunspot maximum that immediately follows the 2001 maximum if the solar cycle continues?