There has to be energy to make a change and a movement.
White light can be decomposed into different colours. (rainbow)
The colours of the rainbow are red, orange, yellow, green, blue, violet and indigo.
Light travels in a straight line.
When a ray of light hits a prisme it makes a rainbow.
Transparent is when you can see light totally through an object. (ex: window)
Translucide is when you can see a bit of light through an object. (ex: kleenex)
Opaque is when you can't see any light through an object. (ex: walls)
A shadow is an abscence of light.