"You're reading a physics book?" Charlie scoffed.
"I'm supposed to go back to school in a few weeks," Sibby explained. "I want to be ready."
"You're in university, why call it school?"
"That's just what they call it, usually," Sibby sighed. "And it's America, they don't call it university, it's college."
"Unless it's school," Charlie laughed. "Anyhow, what are you reading about? Colors?"
"I'm reviewing the physics of the electromagnetic spectrum."
"You lost me there," Charlie admitted.
"I'm reading about colors," Sibby sighed.
"So, Isaac Newton?"
"Actually, yes!" Sibby perked up.
"It's been a few years, explain it to me?"