Standard Science Primary 4 Energy

Which of the following describes the reason why a shadow is formed when light hits a wooden block?

A Light is absorbed by the block.
B Light is reflected by the block.
C Light bends around the block.
D Light travels in a straight line and is blocked by the opaque block.
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Worked Solution

Step 1: Light source emits light. Step 2: Light travels in straight lines. Step 3: Opaque objects (wood) do not allow light to pass through. Step 4: A region of darkness (shadow) is formed behind the object.

Correct answer: Light travels in a straight line and is blocked by the opaque block.

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