When I had attempted to edit an answer so as to add some detail, I was told that details should be included in comments, as an edit would cause the question and its answer to display on the front page. However, a recent edit, adding new and highly-relevant information to the answer of a question less than 5 years old, as well as citing the source of the information, did not result in any new display on the front page. Might the decision-making process determining an additional display of a question on the front page be described?
Editing questions and answers always1 bumps the question to the front page, as long as the question has a score greater than -4.
If you didn't see a question you edited on the front page, it's possible that you have set one of its tags to be ignored. You can check that at https://physics.stackexchange.com/users/tag-notifications/.
1There are a few exceptions that don't apply here. See here if you want all the details.