- Explain what 'refraction' means - http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
- What happens to waves during 'diffraction'? - http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/waves/generalwavesrev5.shtml
- What happens to diffraction when the gap the waves travel through is smaller? - http://www.launc.tased.edu.au/online/sciences/physics/diffrac.html
- What is diffraction important for? - http://www.launc.tased.edu.au/online/sciences/physics/diffrac.html
- Try the activity and quiz on this link, writing down the relationship between wavelength and frequency - http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/waves/generalwavesact.shtml
- What range of frequencies can humans hear? - http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/waves/soundandlightrev1.shtml
- What would be different when an insturment makes a low pitch sound compared to a high pitched one? - http://www.physicsclassroom.com/class/sound/u11l1c.cfm
- What is the formula for working out the speed of a wave? - http://www.physicsclassroom.com/class/waves/u10l2e.cfm
- Explain this picture using the words 'refraction' and 'wavelength'.
- Watch this video (it continues in more 10 minute sections on youtube). Write a written explanation about how soundwaves help Ben see things using the terms particles, reflection and amplitude.
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