What Is a Standard Candle

question 38

Multiple Choice

What is a standard candle?

• A)an object for which we are likely to know the true luminosity
• B)an object for which we can easily measure the apparent brightness
• C)a class of objects in astronomy that all have exactly the same luminosity
• D)any star for which we know the exact apparent brightness
• E)a long,tapered candle that lights easily

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Definitions:

Quadratic Formula

A formula that provides the solutions to a quadratic equation ax^2 + bx + c = 0, given as (-b ± √(b^2-4ac))/2a.

Rectangular Base

Refers to the base of a geometric figure that has a rectangle shape.

Cubic Inches

A unit of volume measurement in the Imperial system, specifically measuring space in three dimensions, symbolized as in³.

Discriminant

A value derived from the coefficients of a quadratic equation that determines the nature and number of its solutions.