Limitation of physical measurements

The range of possible values around a measured quantity within which the true value is likely to lie, arising from limit

Measurements and their errors

Limitation of physical measurements

A measure of how large a measurement uncertainty is relative to the measured value, expressed as a percentage. Calculate

Measurements and their errors

Limitation of physical measurements

The meaningful digits in a measurement or calculated result, reflecting the precision of the measurement or appropriate

Measurements and their errors

Limitation of physical measurements

Unpredictable, non-directional variations in measurements caused by uncontrollable factors such as environmental fluctua

Measurements and their errors

Limitation of physical measurements

A consistent, directional error that shifts all measurements in the same direction (higher or lower than the true value)

Measurements and their errors

Limitation of physical measurements

A measure of how close a measured value is to the true or accepted value of a physical quantity. Accuracy reflects the d

Measurements and their errors

Limitation of physical measurements

A measure of how consistently a measurement can be made or how finely a measurement is resolved. High precision means re

Measurements and their errors

Limitation of physical measurements

The smallest difference in value that a measuring instrument can reliably distinguish. It is typically taken as half the

Measurements and their errors

Limitation of physical measurements

The uncertainty in a measurement expressed as an absolute quantity in the same units as the measurement (e.g., ±0.5 m, ±

Measurements and their errors

Limitation of physical measurements

The uncertainty in the gradient (or slope) of a graph, determined by drawing maximum and minimum gradient lines (lines o

Measurements and their errors

Use of SI units and their prefixes

One of seven fundamental units of measurement in the International System of Units that cannot be derived from other uni

Measurements and their errors

Use of SI units and their prefixes

A standardised multiplier applied to SI units to express values over a wide range of magnitudes. Common prefixes include

Measurements and their errors

Use of SI units and their prefixes

A unit of measurement that is created by combining two or more SI base units through multiplication or division. Example

Measurements and their errors

Use of SI units and their prefixes

A physical quantity that has no units and is determined by a numerical value alone. Examples include refractive index, r

Measurements and their errors

Use of SI units and their prefixes

The process of expressing a measured quantity in different units while preserving the actual value. Conversion requires

Measurements and their errors

Use of SI units and their prefixes

A method of checking the consistency of equations and converting between units by tracking how dimensions (base units) c

Measurements and their errors

Use of SI units and their prefixes

A rough estimate of the size of a physical quantity expressed as a power of 10. Orders of magnitude allow physicists to

Measurements and their errors