One hopes the National Society of Black Physicists filed an amicus brief.

Following Justice Scalia's Plessey Redux question, this:

As former U.S. Solicitor General Gregory Garre, the lawyer for the university, explained how low minority enrollment led to "glaring racial isolation" for students of color, Roberts questioned whether increasing their numbers was a valid educational objective.  

"What unique perspective does a minority student bring to a physics class?" he wondered, but later tweaked the question: "I'm just wondering what the benefits of diversity are in that situation."

Considering that until 1973, there had only been eight in the history of the United States, the data may be incomplete.