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A sound when it bounces back from an object is called what?
Question
Asked 3/11/2010 7:10:15 AM
Updated 7/2/2014 1:24:59 AM
1 Answer/Comment
Flagged by jeifunk [7/2/2014 1:24:59 AM]
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User: A sound when it bounces back from an object is called what?

User: What is an echo?

User: If you can not see through a wall what material is it made of?

Question
Asked 3/11/2010 7:10:15 AM
Updated 7/2/2014 1:24:59 AM
1 Answer/Comment
Flagged by jeifunk [7/2/2014 1:24:59 AM]
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A sound when it bounces back from an object is called ECHO.
Added 7/2/2014 1:24:44 AM
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Updated 9/28/2014 11:38:46 AM
3 Answers/Comments
A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
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A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image.
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A refracting or refractor telescope is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).
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A kaleidoscope is a cylinder with mirrors containing loose, colored objects such as beads or pebbles and bits of glass.
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