CAIE IGCSE Physics 3.4.8 An Echo As the Reflection of Sound Questions

Practise identifying an echo as reflected sound and use the round-trip travel distance with measured time and sound speed to locate a reflecting surface.

Exam points

Identify reflection as producing a delayed sound echo, use total path = speed × echo time and divide by two for one-way distance, and rearrange the round-trip relation to calculate sound speed.

[Maximum number: 1]

State the name of the reflection of a sound wave or ultrasound wave.

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CAIE IGCSE Physics 3.4.8 An Echo As the Reflection of Sound Questions question 1