Physics 122 - Lecture Date: 02/05/16 Questions?
Physics 122 - LectureDate: 02/05/16
Questions?
Announcements/Reminders
Written HW #03 – Due Now!
Written HW #03 – Due Friday, February 12
MP HW #03 – Due Friday, February 12, by 11:59 pm.
Reading assignment (check website) – Due on 02/08/16.
Last class:
* Transmission and reflection.
* Superposition of waves.
* Standing waves.
Today:
* Standing sound waves.
* Interference of waves.
Example (problem 48 from text)
The velocity of waves on a string is 96 m/s. If the frequency of standing waves is 445 Hz, how far apart are two adjacent nodes?
Question
Slide 21-49
A standing wave on a string vibrates as shown.
Suppose the string tension is reduced to 1/4 its original
value while the frequency and length are kept
unchanged. Which standing wave pattern is produced?
Question
Slide 21-50
A standing wave on a string vibrates as shown.
Suppose the string tension is reduced to 1/4 its original
value while the frequency and length are kept
unchanged. Which standing wave pattern is produced?
Standing waves in air columnshttp://www.acs.psu.edu/drussell/Demos/StandingWaves/StandingWaves.html
Interference of waves
Interference of waves