Which statements are true about all white dwarfs? Select the two correct answers.

Question

(1 point)

All white dwarfs have luminosities of around 10-2.

All white dwarfs have temperatures around 10,000 K.

All white dwarfs are classified in spectral class B.

All white dwarfs have absolute magnitudes around 10.

Answer 1

The two correct statements about all white dwarfs are:

1. All white dwarfs have temperatures around 10,000 K. - This is generally true, as white dwarfs are the remnants of stars that have exhausted their nuclear fuel and typically have surface temperatures in this range.

2. All white dwarfs have absolute magnitudes around 10. - White dwarfs typically have absolute magnitudes that are around +10, though this can vary slightly depending on their specific characteristics.

Therefore, the correct answers are the second and fourth statements.