Why Are HII Regions Red in Color

question 43

Multiple Choice

Why are HII regions red in color?

• A)They contain considerable quantities of dust
• B)They emit hydrogen emission lines
• C)They are moving away from us at high speed
• D)Twenty-one cm photons are red in color

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Definitions:

Promotion

Marketing strategies aimed at increasing the visibility, sales or acceptance of a product or service.

Monthly Compounded

The process of calculating interest each month and adding it to the total amount owed, thus earning interest on interest from the following month.

Semi-Annually Compounded

Describes the methodology of applying interest to a principal amount two times within a year.

Quarterly Payments

Payments made four times a year, typically for loans, mortgages, or other financial products.