When light hits an opaque object, a shadow forms on the opposite side of the object.
Light is a form of energy. Light sources are things that produce light.
These are the characteristics of light:
- Light can be natural, like the Sun, or man-made, like light bulbs or candles.
- We need it to see. If it's totally dark, we can't see anything.
- Light always travels in a straight line, it can't move around objects. It travels in all directions.
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