物理实验中,任何测量结果都不可能绝对准确.测量值跟被测物理量的真实值之间总会有差异,这种差异就是误差.误差又分为偶然误差和系统误差.偶然误差是由于实验人操作和读数的偶然因素造成的,通常多次重复同一测量时,偏大和偏小的机会比较接近,可以用取平均值的方法来减小偶然误 Physical experiments, any measurement results can not be absolutely accurate.Measurement with the physical value of measured physical there will always be differences between this difference is the error.Error is divided into accidental errors and systematic errors.Calculation error is due to experiment Occasional factors of human operation and reading caused, usually repeated the same measurement multiple times, the chances of larger and smaller are closer, you can use the average method to reduce the chance of accidental