Oughtn't the rod cells respond more or less the same to colors of the same intensity, producing a uniform gradient from top to bottom, though ? 02 : 31, 5 September 2005 ( UTC)
2.
The reason for the disparity in gradients along the aqueduct's route is that a uniform gradient would have meant that the Pont du Gard would have been infeasibly high, given the limitations of the technology of the time.
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