Siti tried to look at a candle flame through a bent tube but could not see it. When she used a straight tube, she could see the flame. This shows that light __________.
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Worked Solution
Step 1: Compare the two setups (bent vs straight tube).
Step 2: Note that light is blocked by the bend.
Step 3: Conclude that light must travel in straight lines to reach the eye.
Correct answer: travels in straight lines
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