what is definition of internal source error (in physics)
Answers
Measurement is the foundation for all experimental science. An error may be defined as the difference between the measured value and the actual value. For example, if the two operators use the same device or instrument for measurement.
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Answer:
There are different sources of error and are classified as follows:
A). GROSS ERROR:- The human made error are called gross error.
Example:- Person using an instrument and recording wrong data may be due to fault in instrument etc.
The ways to reduce the gross error is as follows:
1. More number of readings should be taken.
2. The reading should be taken after rectifying the instrumental error.
B). SYSTEMATIC ERROR
The error arises due to fault in the system used in measurement.
These are further classified as instrumental, environmental, observational error.
1). Instrumental Error- the error due to manufacturing and are inbuilt.it may also be due to misuse of instrument.
2). Environmental Error:- these are the external conditions that effects the measurement of reading for example the pressure. temperature etc.
These are avoided by taking following measures:-
1).The equipments free from all clutter.
2). The arrangement of the experiment should be proper.
3). Observational error:-the error which is present due the observation of the reading.
This can be avoided by taking digital instruments.
c). RANDOM ERROR:- these are the error that is caused mostly by nature
Example:- sudden change in the weather and these are also called as residual error.