Standard Science Primary 4 Energy

An L-shaped opaque object is placed in front of a light source. Which of the following can NOT be a possible shape of its shadow on a screen?

A A rectangle
B A smaller L-shape
C A larger L-shape
D A circle
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Worked Solution

Step 1: Shadows are formed when light is blocked. The shape of the shadow depends on the orientation of the object. Step [2-9]: An L-shape consists of straight edges and right angles. Step [2-9]: It is impossible for an object with only straight edges to form a perfectly circular shadow.

Correct answer: A circle

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