1. Investigating Refraction of Sound with a Gas Lens Ian Fulton

2. Sound! Transverse Wave

3. Refraction Insert textx

4. Experiment #1 Aim: To determine how the wavelength (frequency) of sound affects its refraction through a Carbon Dioxide balloon. Hypothesis:

5. Method A consistent setup was used to gather all the results which were collected by a microphone connected to a computer-generated Oscilloscope.

6. Insert text

7. Independent and Dependent variables Balloon Microphone Speaker frequency The Amplitude difference was taken for each position.

8. Control Variables Size of the balloon The room temperature Amplitude of the sound Parameters of the setup

9. Results

12. Discussion The hypothesis was at first glance supported by the results The higher frequencies created a higher amplitude than the lower ones when refracted with the CO 2 balloon.

13. The focal length was inside the balloon The loudest point is right next to the balloon. Discussion

14. The Carbon Dioxide balloon was a biconvex lens and refracted the sound inwards. Improvements…

15. Experiment #2 Aim: To determine how the refraction of sound with a Carbon Dioxide balloon is affected by the size of the balloon. Hypothesis: It was determined from the results that the size had very little affect upon the level of refraction, the shape was more relevant.

16. Conclusion In Summary The hypothesis for the first experiment was not supported but it was determined to be the opposite The hypothesis for the second experiment was not supported at all

17. Questions!