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Posted by on Jul 7, 2017 in TellMeWhy |

What Is Radar?

What Is Radar?

What Is Radar? Radar, or radiolocation, as it was called in the early days, is the use of radio waves to find the whereabouts of aircraft or ships. Electromagnetic...

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Posted by on May 31, 2016 in TellMeWhy |

What Makes an Echo?

What Makes an Echo?

What Makes an Echo? An echo is a sound that we hear after it is reflected, or bounced back, from some object. When we shout, sound waves travel through the air in all...

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