Is blocked / opaque material
How does a shadow become when you move the light source near the object?
The shadow becomes bigger
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Draw a shadow
Why don't air and water have shadow?
Because light can pass through them
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Opaque
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How does light travel?
Light travels in a straight line
How does a shadow change when you move the light source
The shadow changes in size
What does the number of shadows depend on?
The number of shadows depends on the number of light sources
What are these?
These are shadows of Dr.Binocs's hands
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What are those?
Those are light sources
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Shadow
How does a shadow become when you move the light source away from the object?
The shadow becomes smaller