Light and Sound

Light and Sound

Sound
Light
1. Characteristics of the light
  1. Light can have an specific colour or white colour
    1. The light of white colour is done by the mixture of primary colours
      1. Blue
      2. Green
      3. Red
  2. How does the light travel?
    1. Light travels in all directions
    2. Light travels in straight lines
2. What is the light?
  1. The light is a form of energy
3. Where is the light produced?
  1. The light is produced by luminous objects.
    1. There are two kind of light sources
      1. Natural light source
        For example
        Sun
        Stars
        Glow Worm
      2. Artificial light source
        For example
        Flashlights
        Bulbs
4. The materials and the light
  1. Opaque materials
    1. Don't allow
      1. The light
        To pass through them
    2. We cannot see
      1. Objects
        Through them
  2. Translucent materials
    1. Allow
      1. Some light
        To pass through them
    2. We can see
      1. Objects
        Through them
        But not clearly
  3. Transparent materials
    1. Allow
      1. The light
        To pass through them
    2. We can see CLEARLY
      1. The objects
        Through them
5. Light's properties
  1. Refraction
    1. The light's direction change
      1. When the light passes from one material to another
  2. Reflection
    1. When the light shines on
      1. An opaque object
        It reflects
        So we can see the object
      2. A mirror
        It reflects
        In the same direction

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