The angle of incidence is 57.9° and the reflected angle is 48.6°. What about a few more tests? Here is that same hover disk with the same wall but at different incident angles.

Finally, the authors numerically demonstrated an angle-multiplexed functional meta-device that can exhibit different controllabilities on the wave-front of light depending on the incident angle.

A collaborative research team, including Institute of Science Tokyo (formerly Tokyo Institute of Technology), has developed wide-incident-angle radio-wave absorbers for millimeter-wave and ...