Shadows are dark shapes. They form when light cannot pass through objects. This video shows the shadows of people. Some are walking. One is riding a bike. The shadows move with the people.
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Where have you seen your shadow? What was the source of the light?
Have you read other books about light and shadows? What did you learn?
Light cannot pass through opaque objects. It can pass through transparent objects. Look at the objects around you. Which are opaque? Which are transparent?
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