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You are exploring in a cave and call out to one of your friends. You hear your echo. Which interaction of sound (reflection, refraction or absorption) caused the echo and how did the sound waves move?
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You are exploring in a cave and call out to one of your friends. You hear your echo. Which interaction of sound (reflection, refraction or absorption) caused the echo and how did the sound waves move?

User Clock
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4 votes
It is an interaction, in the main character of mechanical waves.
User Redsandro
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3 votes
Reflection. The sound waves bounced off of the walls and it came back to you. 
User Gnackenson
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