Light and Dark

Sources of light

Sun, lamp and fire

The function of the headlight on a car

To allow the driver to see the road clearly during the night

The function of the firehouse at the shore

To allow sailors to see the shore clearly

Definition of a shadow

A dark image that is formed when light is blocked by an object

Factors that influence the shape of the shadow

The shape of the object and the position of the light

Factors that influences the size of the shadow

The distance of the object to the source of light & distance of the object to the screen

Factor that influence the clarity of a shadow

The property of the object

Objects that will not produce shadow

Transparent objects

Transparent materials

Materials that allow light to pass through it

Opaque materials

Materials that do not allow light to pass through it