Systematic error is a series of errors in accuracy that are consistent in a certain direction, while random errors are those which are caused by random and unpredictable variation in an experiment. Generally, systematic error is introduced by a problem that is consistent through an entire experiment. Random error is statistical fluctuations that are introduced by imprecision in measurement.Continue Reading
Systematic and random error are best contrasted by using examples. An example of random error would be weighing the same ring three times with the same scale and getting the different values of 17.1, 17.3 and 17.2 grams. Random errors tend to follow a normal distribution. An example of systematic error would be using an electric scale that reads 0.6 grams too high to take a series of masses. Every mass recorded would deviate from the true mass by 0.6 grams.
Both systematic and random error are types of experimental error, and minimizing them is key to a successful and meaningful experiment. Random error is generally corrected for by taking a series of repeated measurements and averaging them. Systematic error is more difficult to minimize because it is hard to detect. Using a second instrument to double-check readings is a good way to determine whether a certain instrument is introducing systematic error to a set of results.Learn more about Physics
The famous Joule-Thompson experiment was designed to answer an important scientific question of the day: Do gases cool down as they expand? The two scientists found that in a situation where no overall work is being done, all real gases except hydrogen and helium cool down.Full Answer >
The oil drop experiment proved that the electric fundamental charge exists and that it is quantized. It is also referred to as the Millikan oil drop experiment after the American physicist Robert A. Millikan.Full Answer >
Johann Wilhelm Ritter discovered ultraviolet light in 1801 during an experiment with silver chloride. His discovery came approximately 1 year after William Herschel discovered infrared light.Full Answer >
The floating egg experiment requires two tall drinking glasses, two raw eggs, some table salt and one spoon. A side-by-side demonstration, using two eggs, shows the difference in densities of fresh water and salt water.Full Answer >