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Required Practical Guide
Physics
Waves
This document contains:
Links to YouTube clips showing the practical procedure
Information from examination boards AQA, OCR, Edexcel
Potential examination questions and answers
This resource is strictly for the use of member schools for as long as they remain members of The PiXL Club. It may not be copied, sold nor transferred to a third party or used by the school after membership ceases. Until such time it may be freely used within the member school.
All opinions and contributions are those of the authors. The contents of this resource are not connected with nor endorsed by any other company, organisation or institution.
Commissioned by The PiXL Club Ltd. November 2016
The PiXL Club Ltd, Company number
© Copyright The PiXL Club Ltd, 2016

2. Required practical – exam boards
AQA

3. Practical procedure: Waves
Video 1
Video 2
Click on each of the tabs to take you to a YouTube clip. Please note these are external sites to PiXL, PiXL does not control the content of these sites.

4. Possible examination style questions
Describe an experiment to find the wavelength of a standing wave on a vibrating string.
What are the units for frequency?
Look at the following ripple tank.
Use the diagram to find the approximate wavelength.
Calculate the frequency of the waves.
Use this information to find the wave speed.
t = 10s
1.2m

5. Possible examination style questions answers
Describe an experiment to find the wavelength of a standing wave on a vibrating string.
ANSWER:
Description of apparatus to generate vibrations in string and a standing wave
Wavelength – ruler to measure across a number of waves. Divide length by number of waves

6. Possible examination style questions answers
What are the units for frequency?
ANSWER:
Hertz / Hz

7. Possible examination style questions answers
Use the diagram to find the approximate wavelength.
ANSWER:
Total length / number of waves
1.2 m / 10 = 0.12 m

8. Possible examination style questions answers
Calculate the frequency of the waves.
ANSWER:
Frequency = number of waves/ time
10/ 10 = 1 Hz

9. Possible examination style questions answers
Use this information to find the wave speed.
ANSWER:
Wave speed = frequency x wave speed
1 x 0.12 = 0.12
m/s

10. Waves can be transverse or longitudinal. What type of wave is
Key questions:
Waves can be transverse or longitudinal. What type of wave is
(a) a water wave on the surface of the water in a ripple tank?
(b) a sound wave in a metal rod?
How would you measure the speed of sound in air?
How would you measure the speed of water waves in a ripple tank?
Why can you not measure the speed of sound waves in a metal rod in the same way?
Is it possible to measure the speed of light?

11. Summary document
A summary document is also available on Huddle which contains all the relevant information about this practical from the different examination boards. It includes practical methods and other potential examination questions.