Magnitude and Luminosity Review

Front

HR Diagram

Back

Be able to interpret THIS diagram on your test.

Front

Which axis on the HR Diagram represents the absolute magnitude of stars?

Back

Vertical axis

Front

Absolute Magnitude

Back

The intrinsic brightness of a star at a standard distance of 10 parsecs

Front

Which star has the highest absolute magnitude?

Back

A star with high luminosity

Front

If two stars have the same apparent brightness but different distances from Earth, what can be said about their luminosities?

Back

The farther star is more luminous

Front

What is the significance of the zero point in the absolute magnitude scale?

Back

It is an arbitrary reference point for comparing star brightness

Front

What does a negative absolute magnitude indicate about a star?

Back

It is very bright

Front

Which factor does not affect a star's position on the HR Diagram? Options: Temperature, Luminosity, Distance from Earth, Absolute magnitude

Back

Distance from Earth

Front

The brightness of a star as seen from Earth is its

Back

apparent brightness.

Front

A very bright star can seem to be dimmer because it is

Back

further away