How Would Astronomers,ancient or Modern,use a "Standard Candle

question 75

Multiple Choice

How would astronomers,ancient or modern,use a "standard candle"?

• A) They would use its faint light to illuminate the setting dials of their telescopes.
• B) They would use it to measure time,using its slow but steady melting.
• C) They would use it to generate a known and extremely reproducible standard spectrum for comparison with stellar spectra.
• D) They would measure distance by comparing its apparent brightness with its known absolute brightness.

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Definitions:

Debt Ratio

The proportion of a company's total debt to its total assets, indicating how much of the company's operations are financed by debt.

Equity Financing

A method of raising capital through the sale of shares in a company, providing investors ownership interests.

Debt Financing

The method of raising capital through the sale of bonds, notes, or loans, which must be repaid along with interest.

Marginal Cost

The cost of producing one additional unit of a product or service.