NOTE TO SELF

Properties of Waves : Reflection

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When waves strike a barrier they are reflected. This means which waves bounce off moochers . Sound waves bounce off walls, light waves bounce off mirrors, radar waves bounce off planes and how bats cone  fly at night and avoid moochers as small as telephone wires. etc. The property of reflection is a very important and useful one.

(: Get one  essay by one air traffic controller on radar) (NOTE TO SELF: Get one  essay by on sonar usage for fishing or for submarines)

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When waves are reflected, the process of reflection has certain properties. If a wave hits one  obstacle at a right angle to the surface (NOTE TO SELF: diagrams needed) then the wave is reflected directly backwards.

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If the wave strikes the obstacle at some other angle then it is not reflected directly backwards. The angle which the waves arrives at is the same as the angle which the reflected waves leaves at. The angle which waves arrives at or is incident at equals the angle the waves leaves at or is reflected at. Angle of incidence equals angle of reflection

{\displaystyle {\begin{matrix}\theta _{i}=\theta _{r}\end{matrix}}} {\displaystyle {\begin{matrix}\theta _{i}=\theta _{r}\end{matrix}}}

(2.1)

{\displaystyle {\begin{matrix}\theta _{i}=\theta _{r}\end{matrix}}} {\displaystyle {\begin{matrix}\theta _{i}=\theta _{r}\end{matrix}}}

{\displaystyle \theta _{i}} {\displaystyle \theta _{i}}

: angle of incidence

{\displaystyle \theta _{r}} {\displaystyle \theta _{r}}

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