A-LEVEL Physics: 1.1.4: Limitation of Physical Measurements (Seneca) Flashcards
Every Measurement has an ___.
Uncertainty.
We can Model a Measurement you Make as 2 Parts: (2)
-The Measurement you Make: “Observed Value”.
-The Actual Value: “True Value”
Observed Value = …
True Value +_ Error(uncertainty)
The Uncertainty of a Measurement is the…
Error.
Types of Measurement Errors: (2)
-Random Error.
-Systematic Error.
What is a ‘Systematic Error’?
A Systematic Error is an Error that Follows a Set Pattern.
How can you Avoid a Systematic Error?
To Avoid a Systematic Error, Use the Measuring Equipment to Measure a Known Value.
This Process is Called ‘Calibration’.
What is a ‘Random Error’?
A Random Error is an Error that Follows No Set Pattern.
What is a Way to Reduce Random Errors?
By Doing Lots of Repeat Readings.
What is ‘Accuracy’?
Accuracy is how Close a Measurement is to the True Value for the Measurement.
What is ‘Precision’?
The Precision of a Measurement is how Close to each other the Repeated Measurements are.
What is ‘Repeatability’?
A Measurement is Repeatable if the Same Person Can Perform the Same Experiment, with the Same Equipment, & Obtain the Same Results.
What is ‘Reproducibility’?
A Measurement is Reproducible if a Different Person Can Perform the Same Experiment, with the Same Equipment, & Obtain the Same Results.
What is ‘Resolution’?
The Resolution of a Measuring Instrument is its Maximum Precision.
