a. the next two C's above this note (one and two octaves above)
b. the C one octave below middle C
c. C#, which is one semi-tone (or piano key or guitar fret) above C
d. D, which is two semi-tones above C
e. The wavelength of middle C, if the speed of sound is 340 m/s
(You will probably not be able to do c-e until the next class.)
2. Find the frequency associated with a blue LED (450 nm).
3. Recall the demonstrations with Chladni plates and the Ruben's (fire) tube. Make sure you understand them.
4. Review the work from the informal lab and write out explanations where asked.
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