Shadows
Light travels in straight lines and can't pass through things like your body, a book or a wall, so behind them is a dark patch the light doesn't reach: a shadow. Clear glass lets light through and makes almost no shadow. As the Sun crosses the sky during the day, shadows move and change length: long in the morning and evening, shortest at noon. A sundial tells the time by where a stick's shadow falls.
Depth 1 · Foundation
You know a shadow forms where something blocks the light, and that shadows move and change length as the Sun moves across the sky.
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- 1
Foundation
You know a shadow forms where something blocks the light, and that shadows move and change length as the Sun moves across the sky.
Your path here
What's still between you and Shadows, depth 1, in the order you can learn it.
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This concept