PHYS102 Experiment 1 Standing Waves on a String
Learning Outcomes:
At the end of this experiment , students should be able to
1. determine the number of nodes and antinodes given the length
of the string and tension.
2. determine the speed of the wave given tension.
3. determine the fundamental frequency and higher harmonics
given speed (kept constant) and wavelengths of the normal modes of vibration.
Run Phet simulation of a standing wave on a string.
https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html
Study an illustration from youtube.
https://www.youtube.com/watch?v=PyHc2WPVwbo
Download (or just view, no need to print) pdf copy of PHYS 102 Laboratory Manual, 2016 edition. This file is uploaded in BlackBoard.
Study Experiment 2 , pages 1-9 .
We cannot do the actual measurements required in the Lab Manual. The procedure below makes adaptation of Phet Simulation of a standing wave on a string.
Step 6. Modify Table 1 on page 7 of Lab Manual as prescribed below.
Please draw the table manually using a ruler .
Perform the required steps and obtain values for the higher harmonics n=2,3,4,5 . Take a screenshot for each trial. Submit images as part of your Lab Report.
Complete Table 1 , including sample calculations and mode n=3 image ,and submit a photo/image of Table 1 as part of your report.
| Number of Loops (n) |
Number of nodes |
Number of antinodes |
Wavelength \( \lambda_{n} = \frac{2x}{n}\) | frequency \( f_{n} = \frac{v}{\lambda_{n}}\) |
|---|---|---|---|---|
| 1 | ||||
| 2 | ||||
| 3 | ||||
| 4 | ||||
| 5 |
Sample calculations:
| Criteria | slightly accomplished |
fully accomplished |
|---|---|---|
| Determined the number of nodes and antinodes. |
||
| Determined the speed of the wave . | ||
| Determined the wavelengths of the normal modes. | ||
| Determined the fundamental frequency and higher harmonics. |
