Question

Which of the following can be used to determine the temperature of a star?
Question 13 options:

A)

Line spectra

B)

Blackbody spectrum

C)

The star's magnetic field

D)

Light from sunspots

Answer 1

To determine the temperature of a star, the best options from your list are:

**A) Line spectra** – Spectral lines indicate the presence of specific elements in a star and the intensity of these lines can be related to the temperature of the star.

**B) Blackbody spectrum** – The blackbody spectrum describes the distribution of radiation emitted by an idealized perfect blackbody at a certain temperature and can be used to determine the temperature of a star through Wien's displacement law or the Stefan-Boltzmann law.

Options C and D are not directly used to determine a star's temperature:

**C) The star's magnetic field** does not provide direct temperature measurements.

**D) Light from sunspots** primarily affects the surface and luminosity of the star but is not directly used to measure its overall temperature.

So, the correct answers are **A** and **B**.