Divergent Validity is demonstrated when a measure of a construct or concept is shown to be unrelated to measures of unrelated concepts. In the article associated to the link above, Divergent Validity is represented through the GAD-7 brief screening instrument.
"The GAD-7 brief screening instrument was developed to optimize accuracy and divergent validity, Kroenke told attendees. It can help detect generalized anxiety disorder, social anxiety disorder, posttraumatic stress disorder, and panic. Probably as good as any other general anxiety screener out there, Kroenke said the GAD-7 is better when used for screening than for monitoring treatment."
This article really meant a lot to me because I think research is so often associated with more of a dull connotation, but in reality, research is and has real life changing and life altering applications. It's cool to see research in action.