Reach for the stars flashcard 2

Front

Absolute magnitude is defined as...

Back

the brightness of an object in space, measured as if you’re 10 parsecs away from the object.

Front

If an object has a luminosity of 7.5, this means...

Back

the object is 7.5 times brighter than the sun.

Front

The effective temperature of a star is related to its...

Back

color

Front

Spectral class is a way of describing a star’s

Back

color

Front

The color index of a star provides information about that star’s

Back

temperature

Front

Which is the correct order for spectral classes?

Back

O, B, A, F, G, K, M

Front

The temperature of the star is measured in what?

Back

Kelvin

Front

Whose law tells you which wavelength of light is most intense for an object?

Back

Wien's

Front

What is the correct formula to calculate the luminosity of a star? Options: L=4πR² σT, L=4πR² σT⁴, L=4πR σT⁴, L=4πR² σT⁶

Back

L=4πR² σT⁴

Front

Apparent Magnitude measures the observed brightness of an object from any point: True Or False

Back

True