Jun Jie placed three sheets of different materials, X, Y, and Z, in a straight line between a torch and a screen. He could see a clear spot of light on the screen. Which of the following is true?
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Worked Solution
Step 1: For a light spot to appear on the screen, light must pass through X, Y, and Z.
Step [2-9]: Transparent and translucent materials allow light to pass through.
Step [2-9]: Therefore, none of them can be opaque.
Correct answer: All three materials allow some light to pass through.
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