Advanced Science Primary 4 Energy

Jun Jie tested three different sheets (X, Y, Z) using a light sensor. Sheet X allowed 95% of light through, Sheet Y allowed 40%, and Sheet Z allowed 0%. Which sheet is most suitable for a privacy window in a bathroom?

A Sheet X
B None of the above
C Sheet Z
D Sheet Y
Show Worked Solution

Worked Solution

Step 1: Privacy windows require "translucent" properties (seeing light but not clear shapes). Step [2-9]: Sheet Y (40%) is translucent. Step [2-9]: Sheet X is transparent and Sheet Z is opaque.

Correct answer: Sheet Y

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