Stan tried to look at a candle flame through a bent tube but could not see anything. When he used a straight tube, he could see the flame clearly. What does this show?
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Worked Solution
Step 1: The observer can only see the light source when the path is straight.
Step 2: This confirms that light does not curve around corners.
Step 3: Therefore, light travels in straight lines.
Correct answer: Light travels in straight lines.
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