Yesterday we had our Waves in 2D test. It took the whole period so that was all for yesterday.
Today we talked about Sound. We watched a video with Paul Hewitt. Most of the beginning was review of what we already learned (parts of a wave, kinds of waves, how to find frequency/period, etc). The rest of the video was describing how CD's work in comparison to Records, how frequencies of Radio Waves operate, a man had this machine showing how sound waves are produced, and how someone who could invent a better windshield wiper could be rich.
After the video we got a lab that is due at the end of tomorrow's class. The lab was about sound and how to produce them. We used rulers (part of the ruler on the table with some hanging off, and plucking it), tuning forks (hitting them with a rubber hammer), and graduated cylinders (filled with water at different levels and blowing against the top).
The sound unit will go onto next week with a test on Thursday (from what I remember).
Sorry this is late (I forgot :D?)
1 comment:
Really great post. The machine to see wave forms is called an oscilloscope.
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