Standard Science Primary 4 Energy

Tim cannot see the flame of a candle when he looks through a bent plastic tube, but he can see it through a straight plastic tube. What does this experiment prove?

A Light can be reflected.
B Light travels in straight lines.
C Plastic is a transparent material.
D Light can pass through bent objects.
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Worked Solution

Step 1: In the straight tube, there is a direct, clear path from the candle to the eye. Step 2: In the bent tube, the path is blocked by the wall of the tube. Step 3: This shows that light cannot bend around corners; it travels in straight lines.

Correct answer: Light travels in straight lines.

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