Final answer:
The Zeeman effect can be used to determine the strength of the magnetic field in our Sun and other stars.
Step-by-step explanation:
The Zeeman effect is a phenomenon in physics where the splitting of energy levels is observed in the presence of an external magnetic field. This effect can be used to determine the strength of the magnetic field in our Sun and other stars. By measuring the splitting of spectral lines in the sunlight, scientists can calculate the strength of the Sun's magnetic field and create magnetograms to map the magnetic activity at the Sun's surface.