(High-pitched tone) Oh, before I even turn that on, one of the things that we did about three weeks ago in my class -- this is through the lens, and one of the things we used a lens for was to measure the speed of light.
(Spalga skaņa) Ai, un pirms es to vispār ieslēdzu, viena no lietām, ko mēs darījām klasē pirms aptuveni trim nedēļām... šis ir skats caur lēcu, un viena no lietām, kam mēs lietojām lēcu bija, lai mērītu gaismas ātrumu.