The answer is tragic irony. Tragic irony is otherwise known
as dramatic irony. This irony can be seen in very nearly all of the classic
dramas categorized as tragedies. In those dramas, the author often allows the
reader, or audience, to identify more about a situation than the characters.
Thus, tragic irony creates inaptness between what a character does or says and
what the reader knows to be true. Often this incidence is very tragic, leading
to the collapse of the character while the audience helplessly looks on.