How does light travel?

1
How does light travel?

• light travels in waves
• a ray is a straight line that represents the path
  of a beam of light
• light will travel in a straight light until it
  strikes something then it might
• continue on (clear or transparent substance)
• reflect back (solid or opaque substance)
• scatter (filmy or translucent substance)

2
How does light travel?

• light travels as waves (like water and sound)
• a ray is a straight line that represents the path
  of a beam of light

3
Shadows

• shadows are created where an opaque (solid)
  object blocks light rays
• the distance of an object from the source will
  affect the size of its shadow