Essay Question for Exam 1

You will be asked to answer this question during Exam 1 on Thursday, February 10. Please think about how you will answer this question before the exam, and write your answer during the exam time on the colored sheet.
PART II: ESSAY (25 points): Answer the question on this sheet only

Explain, in some detail, how we know the following:

  1. the temperature of the surface of the Sun

  2. the luminosity of the Sun

  3. that the elements calcium and silver are present in the Sun

In your answers be sure to state

  1. the physical principles (equations or laws) used to determine each fact, and
  2. the observation (or observations) that are needed.
Confine your answer to this side of the paper. Partial credit may be given.