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Physics, 24.04.2020 19:21 rebekahlm

A small light source located 1 mm in front of a 1-m2m2 opening illuminates a wall behind. If the wall is 1 mm behind the opening (2 mm from the light source), the illuminated area covers 4 m2m2. How many square meters are illuminated if the wall is 3 mm from the light source? 5 mm? 10 mm?

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A small light source located 1 mm in front of a 1-m2m2 opening illuminates a wall behind. If the wal...
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