Question

how to correct errors in physics

Answer 1

make errors..and then correct them,,,using ur own brain and gaining the knowledge reqd. to correct them...:)

Answer 2

Errors in physics can never be corrected. You can, however, reduce errors.

Errors in measurements occur in 2 forms, random and systematic error.

Systematic error is due to how the experiment is done and how the measurements are taken. You can reduce this error by adopting better experimental techniques, but there is a limit as to how much you can reduce this. A good example would be electronic experiments where some low quality resistors have really huge uncertainties, up to 5%! The really good ones are really expensive.

The other kind is random errors. Random errors are usually errors that are introduced due to the experimenter's judgement. A example would be to time a swinging penduleum. Sometimes you take longer to stop the stopwatch, other times you are slower. Sometimes you try to compensate. All these are random errors and they can be reduced in magnitude (how big the value is) by taking average.