Question: A small light source located 1 m in front of a 1-m2 opening illuminates a wall behind. If the wall is 1 m behind the

A small light source located 1 m in front of a 1-m2 opening illuminates a wall behind. If the wall is 1 m behind the opening (2 m from the light source), the illuminated area covers 4 m2. How many square meters will be illuminated if the wall is 3 m from the light source? 5 m? 10 m?

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