An emission shows two distinct lines separated by a small gap.what does this reveal?

Elizabeth Cady Stanton was a social activist, one of the originators of the women’s movement in the United States, and an author, wife, and mother. With her good friend Susan B. Anthony, she campaigned tirelessly for women’s rights, particularly for the right to vote. Although Anthony figures perhaps more prominently in popular memory, Elizabeth Cady Stanton was as an important force in the 19th-century women’s movement.