What are photons?
The smallest visible unit of light
What are transparent objects? Give an example.
Objects which permit the light to pass through completely
What are opaque objects? Give an example.
Objects which block the light to pass through completely
What are transluscent objects? Give an example.
Objects which partially block the light to pass through
How fast does light travel?
0,1 million miles per second or 160 meters per second
What is refraction?
The bending or changing of an object when in contact with liquids and a source of light
What are the 2 types of source of light?
Natural light and artificial light
How is the shadow formed?
When an object stops the light from passing through it, shadow is formed
How does the source of light influence shadow formation?
The source of light will indicate the shadow size, shape and quantity
Which objects will present darkest shadows?
Opaque objects will produce darkest shadows
Which objects will present clearest shadows?
Transluscent objects will produce clearest shadows
Which objects do not produce shadows?
Transparente objects do not produce shadows
What happens to a shadow when the source of light is distant?
It gets smaller
What happens to a shadow when the source of light is close?
It gets bigger
What happens to a shadow when the source of light is a little under the object?
The shadow goes up
What happens to a shadow when the source of light is a little above the object?
The shadow goes down
