Accuracy

Definition

Accuracy is the degree to which a measured value conforms to the true or accepted value. High accuracy indicates that the measurement is very close to the actual value.

5 Must Know Facts For Your Next Test

1. Accuracy is different from precision; while accuracy refers to how close a measurement is to the true value, precision refers to how repeatable measurements are.
2. Significant figures play a crucial role in determining the accuracy of a measurement; more significant figures typically indicate higher accuracy.
3. Systematic errors affect accuracy by consistently causing measurements to deviate from the true value.
4. Calibration of instruments can improve accuracy by minimizing systematic errors.
5. In physics experiments, ensuring high accuracy often involves using precise instruments and techniques as well as considering environmental factors.

Review Questions

• How does accuracy differ from precision in measurements?
• Why are significant figures important for maintaining high accuracy in measurements?
• What types of errors primarily affect the accuracy of a measurement?

Related terms

Precision:

The degree to which repeated measurements under unchanged conditions show the same results.

Significant Figures:

Digits in a number that contribute to its precision and convey meaningful information about its accuracy.

Systematic Error:

Consistent, repeatable error associated with faulty equipment or flawed experiment design that affects all measurements equally.