REVELATION

[noun] - making known something that was secret, or a fact made knownIt was a revelation of the President's involvement in secret arms deals that shocked the nation. [U]That method was a revelation to/for her and she was eager to try it again. [C]His wife divorced him after the revelation that he was having an affair. [C + that clause]Shocking revelations appeared in the papers about the private life of the royal family. [C]