Physics 109 - Standing Waves: Part II

Before this week's experiment, you will be using the online tutor to do an Invention Exercise called 'Planet Phaedra'. The online tutor can be accessed at

A data spreadsheet to be used in the Invention Exercise can be found at PlanetPhaedra_studentspreadsheet. Click on the link and open with your favourite spreadsheet program.

As usual, you get marks for the invention based on any good try at it, not for any particular "right answer".

In week 1 you discovered that the power law relating frequency and wavelength of a standing wave is that frequency is proportional to the inverse wavelength. There are several ways to plot this, and your task is to fit a function to the data for three distinct ways to plot the data.

Next, you can get started on gathering next week's data.

The goal of part 2 is to discover the relationship between the wave velocity and the tension in the wire. Take a few minutes to think about how you will do this efficiently. Things you shuld consider are

Marking Rubric

Planet Phaedra: 2 marks

remember, marks for your graphs require (data, uncertainty in the data, labelled axes with units, caption, and the line or curve that fits the data)

Plot of frequency versus wavelength with a fit: 3 marks

Plot of frequency versus 1/wavelength with a fit: 3 marks

Log-log plot with a fit: 3 marks

Conclusion: 2 marks for conclusion, including the fitting functions, value and units for all parameters, and interpretation of the fitting parameters.