The smallest difference between two objects that can be faithfully detected by a measuring device would be resolution.
Other options are incorrect because:
- Calibration refers to the manipulations made to measuring instruments in order to increase their accuracies.
- Quantification refers to the act of valuing/quantifying something by attaching a figure to it.
- Accuracy refers to the closeness of measurements to their true values.
- Standardization refers to the manipulation of instruments to make them conform to acceptable standards.
Resolution, on the other hand, refers to the smallest measurable distance between two points or objects. Hence, the correct option is resolution.
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