Question
Download Solution PDFWe hear an echo due to
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Echo: An echo is the reflection of sound that arrives at the listener after a delay, caused by the sound wave bouncing off a surface.
Reflection of sound: When sound waves hit a hard surface, they bounce back, creating a reflected sound wave.
Conditions for echo formation:
The distance between the source and reflecting surface should be at least 17.2 meters (for sound velocity ~344 m/s).
The surface should be large and hard.
∴ he correct answer is Option 2: Reflection of sound waves.
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