Today in class we started chapter two in our sound and light book. We first built shoebox guitars and observed how the thickness of the string affected the sound.
We then put a bell inside a vacuum chamber and listened to the change in sound of the bell as we removed some of the air from the chamber. We also put balloons and marshmallows in the vacuum chamber and saw what happened to them.
We then bounced a laser off of a model of an ear drum and saw how different sounds created different laser patterns.
After these demonstrations we completed the good vibrations quick lab on page 30. We experimented with a tuning fork and saw how sound was vibration.
At the close of class we reviewed our recent test.
Note: new homework is available on the resource table.
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