Standard Science Primary 4 Energy

Which of the following materials is most suitable for making the lenses of spectacles?

A Tracing paper
B Clear plastic
C Frosted glass
D Cardboard
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Worked Solution

Step 1: Specacle lenses must allow the wearer to see clearly. Step 2: Clear plastic is transparent and allows most light to pass through. Step 3: Opaque or translucent materials would block or scatter light, making vision unclear.

Correct answer: Clear plastic

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