A Gray Piece of Cardboard Is Placed 1 Cm Away

A gray piece of cardboard is placed 1 cm away from a black patch, 10 cm away from a black patch, and immediately adjacent to a white patch. When will the gray patch look brightest?

A) The gray patch will look brightest when placed 1 cm away from the black patch.
B) The gray patch will look brightest when placed 10 cm away from the black patch.
C) The gray patch will look brightest when placed immediately adjacent to the white patch.
D) Distance from the black patch makes no difference; the gray patch will look brightest when placed next to the black patch, regardless of how close or how far away it is.

Correct Answer:

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