Introduction to waves

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Intros
Lessons
  1. Introduction to Waves
  2. What are waves?
  3. Mechanical Waves VS. Electromagnetic Waves
  4. Transverse Waves VS. Longitudinal Waves VS. Surface Waves
Topic Notes
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In this lesson, we will learn:

  • What are waves?
  • Mechanical Waves VS. Electromagnetic Waves Vs. Surface Waves
  • Transverse Waves VS. Longitudinal Waves

Notes:

  • Definition of wave
    Rhythmic disturbances that can travel through matter. (The matter does not transfer). Energy is transported from one location to another.

Introduction to Waves

  • Mechanical Waves VS. Electromagnetic Waves
    1. Mechanical Waves
      Mechanical waves need medium (substance) to transfer, Example; Sound waves, Water waves.
    2. Electromagnetic Waves
      Electromagnetic waves do not need medium to transfer, they can travel trough vacuum, Example; Radio waves, Microwaves, Infrared, visible light, ultraviolet, X-rays, and Gamma rays.

  • Transverse Waves VS. Longitudinal Waves Vs. Surface Waves
    • Transverse Waves
      Direction of motion of particles is PERPENDICULAR to the direction of motion of wave.

Introduction to Waves

      Note: All electromagnetic waves are transverse waves, for example: radio waves, x-rays

      Note: Some mechanical waves are transverse waves, for example: water waves, vibrating spring

    • Longitudinal Waves
      Direction of motion of particles is PARALLEL to the direction of motion of waves.

Introduction to Waves

      Note: Some mechanical waves are longitudinal waves, such as: sound waves

    • Surface Waves
      They have the characteristics of both longitudinal and transverse waves.
      Example: ocean waves are longitudinal, at the surface, but particles move in both parallel and perpendicular to the direction of wave motion.