Topicsaxbyphysics.com/.../Waves/PJ/StandingWavesLabPostEntry.docx · Web viewBig Idea: You can...
Transcript of Topicsaxbyphysics.com/.../Waves/PJ/StandingWavesLabPostEntry.docx · Web viewBig Idea: You can...
Seed Question: What is a standing wave? Demo.
Exploration: You can think of standing waves as waves traveling back and forth, reflecting off the ends.
Sketch standing waves with fixed ends a distance L apart.
Standing Waves Lab
Take data on the five different standing waves to calculate their speeds. Use the expression you derived in the previous wave entry.
Data:
Length L(m)
Number of humps
Wavelength (m)
Cycles n Time t(s)
Frequency f(Hz)
speed v(m/s)
1234
5 was too fast!
What can you conclude about the speed of waves of different frequencies in the same medium?
Big Idea: You can think of standing waves as the superposition of waves traveling back and forth, reflecting off the ends.
The speed of waves on a spring/rope is independent of the wavelength or the frequency. In the simplest case, the speed of waves in general is independent of the frequency/wavelength.