GRE Physics GR 1777, Problem 025 Solution Posted on January 18, 2021 by polaris GRE Physics GR 1777 Problem Solution 025. Quantum Mechanics (Hermitian operator) You should know about The hermitian operator’s eigenvalues are real. Solution Answer (B) 1, -1 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)