What Is a Standard Candle

question 148

Multiple Choice

What is a standard candle?

• A)an object for which we can easily measure its apparent brightness
• B)an object for which we are likely to know its true luminosity
• C)any star for which we know its exact apparent brightness
• D)a class of objects that we know all have exactly the same luminosity
• E)a unit of luminosity used by astronomers

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Definitions:

Premium Rate

Refers to the higher price or rate charged for goods or services perceived to be of higher quality, or in the case of telecommunications, services that offer added value beyond the basic rate.

Exchange Rate

The value at which one currency can be exchanged for another, affecting international trade and economics.

Tax Rate

The percentage at which an individual or corporation is taxed on their income or profits.

Fiscal Policy

Government actions intended to spark or diminish consumption.