Resolution is not the whole measurement — Modern Dispatch

An instrument may show a reading in very small steps. Those steps describe its displayed resolution, but they do not by themselves establish how closely the reading matches the quantity you want to measure.

Consider the method and the conditions alongside the display. A finely marked ruler is difficult to use precisely if the object’s edge is unclear. A digital instrument can have many digits while still needing calibration or a careful placement.

Choose the detail appropriate to the question and avoid reporting unsupported precision. A result with a clear explanation of its limits is more informative than a long number with no account of how it was obtained.

A few starting points

Identify the smallest displayed step.
Check what affects the reading’s accuracy.
Report detail that the method can support.

Try the idea in context.

A display with more pixels can still show an image captured with poor focus. Extra samples do not explain every limit in the picture.

A thought for the next read.

An observation has a method behind it. Keep the instrument, conditions, and comparison close to the result so another reader can understand what was measured.