Wave behavior at a boundary

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Intros
Lessons
  1. Wave behavior at a boundary
  2. Introduction to reflection and refraction of waves;
  3. Properties of medium affect the motion of the waves.
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Examples
Lessons
  1. Reflection from less dense medium
    A pulse is sent along a thick rope connected to a thin rope.

    Wave behavior at a boundary

    1. What happens when the pulse reaches the boundary?
    2. Is the reflected pulse erect or inverted?
    1. Reflection from denser medium
      A pulse is sent along a thin rope connected to a thick rope.

      Wave behavior at a boundary

      1. What happens when the pulse reaches the boundary?
      2. Is the reflected pulse erect or inverted?
      1. Reflection from less dense and denser medium
        A pulse is sent along a thick rope connected to thin rope which is tied to a wall.

        Wave behavior at a boundary

        1. What happens at point where the ropes are connected?
        2. What happens at the point where the thin rope is connected to the wall?
        Topic Notes
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        In this lesson, we will learn:

        • Reflection at boundaries
        • Properties of the reflected waves

        Notes:

        As waves move from one medium to another partially reflected and partially refracted (transmitted).
        • Reflection; The process of bouncing off the boundary between two media.
        • The wave striking the boundary is called the incident wave
        • The wave bouncing off the boundary is called the reflected wave.
        • Refraction; Transmission of the energy from one medium to another. Sound waves change speed due to the temperature.
        • Water waves speed changes according to the depth.
        • Spring thickness changes the speed of the waves.
        • Wave reflecting from less dense medium is ERECT.
          Example; reflection from thinner rope into thicker rope

        Wave behavior at a boundary

        • Wave reflecting from denser medium is INVERTED.
          Example; reflection from WALL or from a THICK rope

        Wave behavior at a boundary