Student campuses will use infrared rays to force students to sleep at night times

Strugatsky Brothers : science fiction authors
"There was light in Room 107, where shadows were moving and it was clear that somebody was hitting somebody else over the head with a pillow, and intended to go on hitting him until the inaudible and invisible stream of infrarays forced even the most restless to go to sleep, which would happen in two minutes."

Noon: 22nd Century