Why are spectral lines useful in classifying stars?(1 point)
Responses
They show the composition of a star.
They show the composition of a star.
They show a star's location.
They show a star's location.
They indicate a star's age.
They indicate a star's age.
They show the layers that make up a star.
They show the composition of a star.
The correct answer is: They show the composition of a star.
Spectral lines are useful in classifying stars because they provide information about the composition of a star. Each element or molecule in a star's atmosphere absorbs or emits light at specific wavelengths, creating unique spectral lines. By analyzing these lines, scientists can determine which elements are present in the star and in what quantities. This allows them to classify stars based on their chemical composition and gain insights into their evolutionary stage and physical properties.