Advanced Science Primary 4 Energy

Luke conducted an experiment to see how the distance of an object from a light source affects the height of its shadow. Based on the setups below, which setup will produce the LARGEST shadow on the screen?

A Setup C (Object 15cm from light source)
B Setup A (Object 5cm from light source)
C All shadows will be the same size.
D Setup B (Object 10cm from light source)
Show Worked Solution

Worked Solution

Step 1: Understand the relationship between light source distance and shadow size. Step 2: When an object is closer to the light source, it blocks more light rays. Step 3: This results in a larger shadow on the screen behind it. Step 4: Setup A has the shortest distance (5cm), thus the largest shadow.

Correct answer: Setup A (Object 5cm from light source)

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