lecture13_th2_25

lecture13_th2_25 - A string of beads are connected by a set...

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Unformatted text preview: A string of beads are connected by a set of taut, ideal springs. At the instant the clock starts (t=0), a pulse is moving to the right on the beads and the shape looks like this. Which of the following graphs looks like a graph of the position for the bead marked with a red arrow as a function of time? Clicker question A B C D Phys 1240: Sound and Music Reminder: lecture attendance is not required. If you do attend, please create a good learning environment! Please opt-in to reduce distractions: Turn off cell phones Put away laptops Put away newspapers or other reading Stop side conversations www.colorado.edu/physics/phys1240 LAST TIME: Interference, superposition, beats. TODAY: Diffraction. NEXT TIME: Outdoor sound, Doppler shift, sound intensity and loudness. READ : Ch 5.1 and 5.2 Homework 4 due TONIGHT. Homework 5 and Reading Question 6 due Thursday. Phys 1240: Sound and Music The pulse on the left is moving right, the pulse on the right is moving left. What do you see at the central moment they pass through one another? Clicker question How can it be that a high pitched sound produced by A reaches B if the wall between them strongly absorbs sound? (Which is the best reason?) (Assume walls are very smooth) a) Because the sound reflects once b) Because the sound reflects many times c) Because of diffraction through the opening d) Some other reason is most important e) It wouldnt reach B A B Clicker question Phys 1240: Sound and Music Reminder: lecture attendance is not required. If you do attend, please create a good learning environment!...
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lecture13_th2_25 - A string of beads are connected by a set...

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