Edexcel IGCSE Physics · Spec 3.23
Reflection and Refraction of Sound
Covers explain echoes, Explain refraction of sound and Apply the ideas to atmospheric sound.
Physics revision video
Reflection and Refraction of Sound
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Spec 3.23
What you need to know
- Explain echoes
- Explain refraction of sound
- Apply the ideas to atmospheric sound
Active recall
Quick check
Answer each question before opening the answer.
Why divide echo distance by two?
The measured time covers the outward and return journey
What causes sound refraction?
A change in sound speed, often due to a temperature gradient
How does refraction differ from reflection?
Refraction is bending due to speed change; reflection is a bounce at a boundary
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