The easiest way is just to ask her.
If that is not possible (because she is dead), you have to guess. Religions have no relation to genotype. There are no physiological aspects, inherited or emergent, that conclusively identify any major religion. If you're asking this question from the standpoint of wishing to know how to properly treat the body post-mortem, you'll have to use your conscience, and whatever advice you deem appropriate. The fact is that you can't know someone's faith or someone's mind -- even in life -- and never in death. Of course, if this is already determined by someone else, you can always ask that person. You can also determine her religion by the type of religious burial service she gets. (Again this requires someone else to make a determination first.)
Generally Hindu woman wear Bindi on their forehead. So we can identify them. Muslim woman wear mask.
you would find Muslim people.
There are two type of marriage in Islam--permanent and temporary. For permanent marriage, a Muslim can only marry a Muslim. But for temporary marriage a Muslim man can marry a woman from people of Book (i.e. Christian or Jew).
yes, a wife deserves to know or she will find out herself eventually.
I would find an elderly woman
Muslims live everywhere. Muslims do not live in one place or have one color skin. Islam (the Muslim Religion) is the religion not the blood. I am A white woman from Arkansas that does not cover her hair and I am Muslim. You likely see Muslims everyday and dont know it.
Sure they would, if they find the right woman.
none of the empires
Love is the main slogan of our life. However, sexual love is controlled in all religions and is subject to conditions and restrictions. Per Islam religion, no sexual love is allowed outside a licit marriage. Accordingly, per Islam teachings, a Christian woman can find love with a Muslim man but within a licit marriage. A Christian man can't find love within marriage with a Muslim woman unless he converts to Islam with sincere belief in the authenticity and truthfulness of Islam religion.
If you find a dead body and not sure about the religion that either that person is Muslim or Non Muslim, Give a bath to the dead body and offer that water to a horse with which you gave bath to the body. If the horse accept it, it would be a muslim other wise non muslim.
not to answer a question with a question but why would you want to?
Batman would find a way to win.