How Is a Luminosity Class Assigned to a Star

question 21

Multiple Choice

How is a luminosity class assigned to a star?

• A) By combining the apparent magnitude with the star s parallax.
• B) By measuring the period of variability in the star s apparent magnitude.
• C) By studying the absorption line width in the spectrum of the star.
• D) By observing the angular size of the star s image in a photograph or digital image.

---

Definitions:

Credit Losses

Financial losses that a lender anticipates or experiences due to borrowers failing to make required payments.

Allowance for Doubtful Accounts

A contra-asset account used to estimate the amount of receivables that may not be collectible.

Net Income

A company's total earnings or profit, calculated as revenue minus expenses, taxes, and costs.