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Author Question: Why are different spectral lines, such as helium, more visible in the corona than in the Sun's ... (Read 12 times)

elizabeth18

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on: Jul 27, 2018
Why are different spectral lines, such as helium, more visible in the corona than in the Sun's normal absorption spectrum?
 
  What will be an ideal response?

Question 2

Give at least two advantages of the Kelvin temperature scale for astronomers.
 
  What will be an ideal response?


shewald78

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Reply #1 on: Jul 27, 2018
Answer to Question 1

The corona is much hotter, and can ionize helium, which the photosphere is too cool to do.

Answer to Question 2

It is an absolute scale, so there are never any negative readings. Wein's and Stefan's laws are only mathematically correct if Kelvin temperatures are used.


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