Penny: Uh, hey, what's Sheldon supposed to be? Leonard: Oh, he's the Doppler effect. Sheldon: Yes. It's the apparent 1️⃣ ________ in the frequency of a wave caused by relative motion between the 2️⃣ _______ of the wave and the 3️⃣ _______. Penny: Oh, sure, I see it now. The Doppler effect. All right, I got to shower. You guys, um, make yourselves comfortable. Leonard: Okay. Sheldon: See? People get it. @i_like_eng #video ALL VIDEOS HERE