Question

What are two chemical elements that cause absorption lines in the solar spectrum and what does the presence of these chemicals in the Sun tell us about its age and formation history?

Answer 1

Answer:

During the first half of the 19th century, scientists such as John Herschel, Fox Talbot, and William Swan studied the spectra of different chemical elements in flames. Since then, the idea that each element produces a set of characteristic emission lines has become well-established. Each element has several prominent, and many lesser, emission lines in a characteristic pattern.