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Unformatted text preview: ferent. We call this a difference in
timbre (pronounced "tambur", following its French root.) If you were to Fourier
analyze the sound produced by each instrument, what quantities would be the same
and what quantities would be different in the spectrum produced by each
instrument? Include a sketch of the Fourier spectrum to illustrate your points.
(c) In each case we're assuming that you're plucking a string in the same way, so
the ultimate source of the sound - a string's vibration - is the same. Explain why the
sounds are so different.
6. EM Waves: Some Numbers.
(a) What frequency electromagnetic wave will have a wavelength comparable in size to
(i) the Earth; (ii) a blue whale; (iii) a microwave oven; (iv) a Pentium Core 2 Duo
microprocessor chip; (v) the gate length of a transistor on a Pentium chip (about 40
nm); (vi) an atom; and (vii) an atomic nucleus?
(b) How long does it take for an electromagnetic wave to travel (i) from your computer
screen to your eyes? (ii) from New York to LA? (iii) from the...
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