How Does the Temperature Inside the Umbra of a Sunspot

question 272

Multiple Choice

How does the temperature inside the umbra of a sunspot compare with the solar photosphere outside the sunspot?

• A) The umbra is about 800 K hotter.
• B) The umbra is about 4000 K cooler
• C) The umbra is about 1500 K cooler.
• D) They are about the same temperature, the umbra being an absorbing layer over the sunspot.

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