Doonesbury by Garry Trudeau for November 23, 1980
Transcript:
Bernie: "Because the refractive index of water is 1.333 or 4/3, the velocity of light in water is only 1/2 of that in a vacuum. Mike: So? Bernie: I dunno. I just thought you might be interested. Hey, Mike, I wonder if you could cover for me at lab this afternoon. Mike: I guess. Where are you going? Bernie: I've got to wrap up some of my time-frame experiments in the fourth dimension. Mike: Geez. I wish you'd stop messing with that stuff. You don't have any controls at all. Bernie: Don't worry. It's not all that dangerous. See you later. Mike: Okay. Be careful. Bernie: I will. Oh, no. Mike: What's wrong? Bernie: The place is a shambles. As usual. Mike: The fourth dimension is a shambles? Bernie: Nobody ever empties the ashtrays. People are so inconsiderate.