Please enable JavaScript.

Coggle requires JavaScript to display documents.

Light and shadows - Coggle Diagram

- - - - It allows most light to pass through and we can see through it clearly
        
        Example
        
        Glass
        
        Clear plastic
        
        Air
        
        Drinking water
    - - It allows some light to pass through and we cannot see through it clearly
        
        Example
        
        Frosted glass
        
        Tracing paper
        
        Cloth
        
        Some types of plastic
    - - It does not allow light to pass through it and we cannot see through it
        
        Metal
        
        Wood
        
        Rubber
        
        Clay
  - - - so that an accurate result can be obtained
  - - - The lesser the amount of light can pass through it
- - - - A bigger shadow is formed
    - - A smaller shadow is formed
  - - - Sun is horizontal
        
        Longer shadows
    - - Sun is overhead
        
        Shadows are shorter
- - - - An object is a source of light
        
        It can give off light that
        
        Enters our eyes so we can see the object directly
      - An object reflects lights from the source of light
        
        Must reflect light from a light source to
        
        Enter our eyes so that we are able to see them
  - - - Light from the surrounding is reflected by objects first onto the smooth surface of mirror
      - The light is then reflected again by the smooth surface of the mirror and enters our eyes
      - This enables us to see the images of objects in the mirror
  - - - By
        
        The first mirror reflects the light onto the second mirror
        
        The second mirror then reflects the light into our eyes for us to see the image of the object
        
        The object reflects the lights from the surroundings onto the first mirror
- - - - Shadows are formed
  - - - Produce Dark Shadows
      - When light is blocked by an opaque object the object has a dark shadow on the screen
        
        A screen is opaque which allows dark Shadows to form on it
      - When light is blocked by a an opaque object with a hole
        
        a dark shadow and a bright patch of light will form on the screen
    - - Produce Light Shadows
    - - Produce no or little Shadows
- - - - Energy
        
        Ability to do work can be found in many different forms in our surroundings
    - - Eg
        
        Light can be seen from a point when the holes of three cardboards are arranged in a straight line
        
        When one of the holes is not in a straight line
        
        Light cannot be seen from the point when the whole of one cardboards is not arranged in a straight line with the holes of the two other cardboards