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Which of the following does the negative sign in the power -3 D signify? A. The focus is on the same side of the lens as the object. B. The focus is on the opposite side of the lens as the object. C. The principal focus is situated outside the principal axis. D. The focal length on one side of the lens is smaller than that on the other. |
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Answer» Correct option is: A. The focus is on the same side of the lens as the object. |
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