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A yellow source of light is placed in front of three cardboards having openings A, B, C and D, where A, C, D are collinear as shown below. From which of the openings will the light source be visible? |
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Answer» A yellow source of light is placed in front of three cardboards having openings A, B, C and D, where A, C, D are collinear as shown below.
From which of the openings will the light source be visible? |
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