Standard Science Primary 4 Energy

In an experiment, a wooden ball was placed between a torch and a screen. What will happen to the size of the shadow if the wooden ball is moved closer to the torch?

A The shadow disappears.
B The shadow remains the same size.
C The shadow becomes larger.
D The shadow becomes smaller.
Show Worked Solution

Worked Solution

Step 1: Light spreads out from the source (torch). Step [2-9]: Moving the ball closer to the torch means it intercepts more diverging light rays. Step [2-9]: This causes a larger area on the screen to be blocked from light, resulting in a larger shadow.

Correct answer: The shadow becomes larger.

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