Echo is a ___________ of sound?
Correct answer: A. Reflection
- A. Reflection
- B. Refraction
- C. Interference
- D. None
Explanation
An echo occurs when a sound wave reflects from a distant surface and returns to the listener after a noticeable delay. Refraction changes the direction of a wave as it enters another medium, whereas an echo specifically involves reflection.
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About Physics in Daily Life
Everyday physics explains motion, force, work, power, pressure, heat, light, sound and electricity through familiar devices and natural events. Topics include simple machines, friction, expansion, reflection and refraction, lenses, household circuits, electrical safety and magnetism, with mass distinguished from weight and heat distinguished from temperature.
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