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Created page with "==Key Stage 4== ===Meaning=== Echolocation is a method for finding objects using reflected sound waves. ===About Echolocation=== Echolocation takes pl..."
==Key Stage 4==
===Meaning===
[[Echolocation]] is a method for finding [[object]]s using [[reflect]]ed [[sound]] [[wave]]s.
===About Echolocation===
[[Echolocation]] takes place in several steps:
#A [[sound]] is emitted.
#The [[sound]] travels until it hits an [[object]].
#The [[sound]] is [[reflect]]ed by the [[object]].
#The [[sound]] travels back to the emitter.
#The [[sound]] is detected.
: The time it takes the [[sound]] to return to its source can show how far away the [[object]] is located. Since the [[sound]] has to travel to the [[object]] and back again this time is twice as long as the time taken just to travel to the [[object]].
[[Echolocation]] is used by:
*[[Bat]]s - To avoid obstacles when flying and to find [[prey]].
*[[Dolphin]]s - To locate [[prey]] and the size and shape of their surroundings.
*[[Boat]]s - To find shoals of [[fish]] and to find the distance to the sea bed.
*[[Submarine]]s - To navigate underwater detecting the sea bed and to locate [[ship]]s.
===Equation===
''NB: You do not have to remember the equation in this form, but should be able to work it out for yourself and apply it.''
Distance = (Speed) x (Time)/2
The [[time]] is divided by two because the [[sound]] wave must travel to the [[object]] and then back again to the detector.
<math>x = v \frac{t}{2}</math>
Where:
<math>v</math> = The [[speed]] of [[sound]] through that [[medium]].
<math>\frac{t}{2}</math> = The [[time]] taken for the [[sound]] to travel to the [[object]] or from the [[object]] back to the detector.
<math>x</math> = The [[distance]] between the [[emitter]] and [[object]].
===Example Calculations===
===Meaning===
[[Echolocation]] is a method for finding [[object]]s using [[reflect]]ed [[sound]] [[wave]]s.
===About Echolocation===
[[Echolocation]] takes place in several steps:
#A [[sound]] is emitted.
#The [[sound]] travels until it hits an [[object]].
#The [[sound]] is [[reflect]]ed by the [[object]].
#The [[sound]] travels back to the emitter.
#The [[sound]] is detected.
: The time it takes the [[sound]] to return to its source can show how far away the [[object]] is located. Since the [[sound]] has to travel to the [[object]] and back again this time is twice as long as the time taken just to travel to the [[object]].
[[Echolocation]] is used by:
*[[Bat]]s - To avoid obstacles when flying and to find [[prey]].
*[[Dolphin]]s - To locate [[prey]] and the size and shape of their surroundings.
*[[Boat]]s - To find shoals of [[fish]] and to find the distance to the sea bed.
*[[Submarine]]s - To navigate underwater detecting the sea bed and to locate [[ship]]s.
===Equation===
''NB: You do not have to remember the equation in this form, but should be able to work it out for yourself and apply it.''
Distance = (Speed) x (Time)/2
The [[time]] is divided by two because the [[sound]] wave must travel to the [[object]] and then back again to the detector.
<math>x = v \frac{t}{2}</math>
Where:
<math>v</math> = The [[speed]] of [[sound]] through that [[medium]].
<math>\frac{t}{2}</math> = The [[time]] taken for the [[sound]] to travel to the [[object]] or from the [[object]] back to the detector.
<math>x</math> = The [[distance]] between the [[emitter]] and [[object]].
===Example Calculations===