Why Do O- and B-Type Stars Have Weaker Hydrogen Absorption

question 56

Multiple Choice

Why do O- and B-type stars have weaker hydrogen absorption lines than A-type stars?

• A) O- and B-type stars are cooler than A-type stars.
• B) O- and B-type stars are smaller than A-type stars.
• C) A larger fraction of hydrogen atoms in O- and B-type stars is ionized.
• D) O- and B-type stars have converted much more of their hydrogen into heavier elements.
• E) A-type stars have a higher mass than O- and B-type stars, so they have more hydrogen.

---

Definitions:

Dividend Yield

The dividend per share divided by the price per share, indicating how much a company pays out in dividends each year relative to its stock price.

Constant-Growth Model

A method used to value a company's stock by assuming a constant rate of dividend growth, often used for companies with stable growth rates.

Market Return

The total return, including capital gains and dividends, from investing in a broad market index over a specified period.

IPO Pops

The phenomenon where the price of a stock rises significantly above its initial public offering price shortly after it starts trading on the public market.